ISPN-3809 Manual indexing cannot be triggered when running in server mod...

...e

The MapReduceInitializer is not loaded from server classpath due to improper module config and as a consequence the m/r task is not properly initialized.

* Add ManualIndexingTest for server
* Fix module dependencies so MapReduceInitializer gets loaded and executed properly

* Also modify RemoteQueryTest.readClasspathResource to use Util.readStream instead of duplicating the code

Please integrate in master.

Jira: https://issues.jboss.org/browse/ISPN-3809