Multiple fixes:

MINDEXER-84 updater bug
MINDEXER-85 POM reading
MINDEXER-86 legacy transport format removed
MINDEXER-41 unique by GAVCE from now on
Add file ext to be searchable.
Merge remote-tracking branch 'asf/master' into sixpack

Conflicts:
	indexer-core/src/main/java/org/apache/maven/index/incremental/DefaultIncrementalHandler.java
	indexer-core/src/main/java/org/apache/maven/index/packer/DefaultIndexPacker.java
Fixing the tests and more

relates to previous changes mostly in tests, to
not pollute "randomly created" files the build itself
Merge remote-tracking branch 'origin/master' into sixpack