Changes

Enable tycho's p2-metadata baseline replacement feature
This has a couple benefits:
 * Fail the build if it detected that the contents of a built bundle
   or feature jar has changed without a corresponding version change
   (as compared to the same bundle or feature jar in the baseline repo)
 * Avoiding unnecessary version bumps to features or bundles where a
   change did not result in any change to the contents of built bundle
   or feature jars (the artifacts will be replaced by ones from the
   baseline repository to preserve qualifier values)
 * Avoids false positive warnings from the
compare-version-with-baselines
   plugin due to changed signatures from the jar signing process
This change also contains a version bumps for the following features to
fix problems detected by the above:
 * o.e.ecf.rs.servlet.feature -- where a bundle in orbit had changed
   causing our feature.xml to have changed without our knowlege
 * o.e.ecf.filetransfer.httpclient45.feature -- where constituent
   bundles had been version bumped but the feature had not been
Change-Id: I6770712c804d60bbde5cc3bffdc0b23f744b9e95 Signed-off-by: Mat
Booth <mat.booth@redhat.com>

Update to Orbit repo to use new versions of httpclient and
httpcomponents
Change-Id: I44e0f6d56e44df6cbde01731833bdb71ee25f382