Bumped HTH and reshuffled deps

As now, junit-runner pulls in server-provider
so lessening the dependency count.
Use HTH in Nexus1197CheckUserAgentIT
Dropped unneeded helper class
Plexus Jetty gone from nexus-core
Fixed the misunderstood change

Returned the ErrorServelt as UT expects
Adjusting test

Improving assertions, and removing unnecessary resources
Fixes for ITs
Using inherited test util
Using inherited test util
Fixing IT

As testing realm changed, and got rid of plx xml
Removal of reduntant TestUtil creation

As it gets inherited
Added HEAD support

As one IT depends on it, bah
Cleaned Kenai realm

Uses HTH now to emulate Kenai API
Javadoc

Cannot "lessen" test requirements for now, as
these tests expect whole security + config to be
started up.
Removed dependency

But seemingly no test was using it.
Merge remote-tracking branch 'origin/master' into hth-in-tests
Indexer freed from jetty testsuite
removed jettytestsuite from rrb

But as this plugin is already a mess, and unsure
will it stay or not, did not spent any effort
to clean up the already convoluted logic of
"remote parsing"
Undoing changes pushed by mistake

Legacy ITs are one big chunk of work, not done
yet in core, everything else should be ready for merge
Merge pull request #449 from sonatype/hth-in-tests

HTH in tests