[NEXUS-6027] simplify jetty integration, drop nexus-jetty8, allow multiple configuration files to be used to configure the server
Merge branch 'NEXUS-6027-kill-deprecated-code' into NEXUS-6027-simplify-jetty-integration
headers
Merge branch 'NEXUS-6027-kill-deprecated-code' into NEXUS-6027-simplify-jetty-integration
isolate appcontext into Configuration class
Simplify
cleanup jetty8 booter
further simplify bootstrap configuration handling, expose proeprties and classloader to jettyserver
Simplfy embedeed nexus server for legacy its
notes
more booter cleanup
more booter cleanup
notes
more booter cleanup
Merge branch 'master' into NEXUS-6027-simplify-jetty-integration
fix putall
derp
Merge branch 'master' into NEXUS-6027-simplify-jetty-integration

Conflicts:
	testsupport/nexus-test-harness-launcher/src/main/java/org/sonatype/nexus/test/booter/Jetty8NexusBooter.java
bring back the thread wrapper around jetty start/stop so we can wait for the server to stop fully.
notes and refined logging