JBIDE-18907 - ensure all 'externally managed' servers still have a poller run against them to verify state, which may prevent subsequent bugs in publishing, deployment scanners, etc

Javadoc update

Change externally managed label to be more clear
Very strange regression in unit tests, but, no excludes pattern was set, so not sure what changed (ie, how did this work before?) Seems project is built now so bin folder is not empty and must be excluded