AS7-6246 ENC read-only during legacy SAR deployment

When the `#startService()` and `#stopService()` methods of a sublass of
`ServiceMBeanSupport` are invoked the JNDI context is read only.

- pass the deployment unit service name to `MBeanRegistrationService`
- clean up `AbstractService`
- add a dependency to naming to jmx

Things aren't perfect after the path though. You still get an exception
when stopping JBoss AS. I can't make much sense out if this, it'd be
great if somebody could give me a pointer.

```
22:30:03,523 WARN  [com.github.marschall.sars.legacy.LegacySample] (MSC service thread 1-3) Stopping failed service.server.monitor:service=LegacySampleMBean: javax.naming.NamingException: JBAS011836: Could not resolve service service jboss.naming.context.java.global.env.foo.legacy
	at org.jboss.as.naming.WritableServiceBasedNamingStore.unbind(WritableServiceBasedNamingStore.java:108)
	at org.jboss.as.naming.NamingContext.unbind(NamingContext.java:286)
	at org.jboss.as.naming.InitialContext.unbind(InitialContext.java:167)
	at org.jboss.as.naming.NamingContext.unbind(NamingContext.java:294)
	at javax.naming.InitialContext.unbind(InitialContext.java:439) [rt.jar:1.8.0-ea]
	at com.github.marschall.sars.legacy.LegacySample.stopService(LegacySample.java:30) [sar-legacy-1.0.0-SNAPHSOT.sar:]
	at org.jboss.system.ServiceMBeanSupport.jbossInternalStop(ServiceMBeanSupport.java:283) [jboss-as-system-jmx-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
	at org.jboss.system.ServiceMBeanSupport.stop(ServiceMBeanSupport.java:163) [jboss-as-system-jmx-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0-ea]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.8.0-ea]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0-ea]
	at java.lang.reflect.Method.invoke(Method.java:474) [rt.jar:1.8.0-ea]
	at org.jboss.as.service.AbstractService.invokeLifecycleMethod(AbstractService.java:62)
	at org.jboss.as.service.StartStopService.stop(StartStopService.java:67)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1911)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:1874)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.8.0-ea]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.8.0-ea]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.8.0-ea]

22:30:03,532 SEVERE [sar-pojo] (MSC service thread 1-1) could not bind value: javax.naming.NamingException: JBAS011836: Could not resolve service service jboss.naming.context.java.global.env.foo
	at org.jboss.as.naming.WritableServiceBasedNamingStore.unbind(WritableServiceBasedNamingStore.java:108)
	at org.jboss.as.naming.NamingContext.unbind(NamingContext.java:286)
	at org.jboss.as.naming.InitialContext.unbind(InitialContext.java:167)
	at org.jboss.as.naming.NamingContext.unbind(NamingContext.java:294)
	at javax.naming.InitialContext.unbind(InitialContext.java:439) [rt.jar:1.8.0-ea]
	at com.github.marschall.sars.pojo.PojoSample.stop(PojoSample.java:33) [sar-pojo-1.0.0-SNAPHSOT.sar:]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [rt.jar:1.8.0-ea]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) [rt.jar:1.8.0-ea]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [rt.jar:1.8.0-ea]
	at java.lang.reflect.Method.invoke(Method.java:474) [rt.jar:1.8.0-ea]
	at org.jboss.as.service.AbstractService.invokeLifecycleMethod(AbstractService.java:62)
	at org.jboss.as.service.StartStopService.stop(StartStopService.java:67)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1911)
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:1874)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.8.0-ea]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.8.0-ea]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.8.0-ea]

22:30:03,551 ERROR [org.jboss.as.naming] (MSC service thread 1-2) JBAS011811: Failed to release binder service, used for a runtime made JNDI binding: java.lang.NullPointerException
	at org.jboss.as.naming.deployment.RuntimeBindReleaseService.stop(RuntimeBindReleaseService.java:69) [jboss-as-naming-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1911) [jboss-msc-1.0.3.GA.jar:1.0.3.GA]
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:1874) [jboss-msc-1.0.3.GA.jar:1.0.3.GA]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.8.0-ea]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.8.0-ea]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.8.0-ea]

22:30:03,558 ERROR [org.jboss.as.naming] (MSC service thread 1-3) JBAS011811: Failed to release binder service, used for a runtime made JNDI binding: java.lang.NullPointerException
	at org.jboss.as.naming.deployment.RuntimeBindReleaseService.stop(RuntimeBindReleaseService.java:69) [jboss-as-naming-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1911) [jboss-msc-1.0.3.GA.jar:1.0.3.GA]
	at org.jboss.msc.service.ServiceControllerImpl$StopTask.run(ServiceControllerImpl.java:1874) [jboss-msc-1.0.3.GA.jar:1.0.3.GA]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.8.0-ea]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.8.0-ea]
	at java.lang.Thread.run(Thread.java:722) [rt.jar:1.8.0-ea]
```

https://issues.jboss.org/browse/AS7-6246