Merge branch 'master' into stable-6.6

Merge branch 'master' into stable-6.6

* master:
  GraphObjectIndex: fix search in findGraphPosition
  Update to Tycho 4.0.0-SNAPSHOT
  PGP sign p2 artefacts
  Revert 'Use net.i2p.crypto:eddsa directly from Maven Central'
  Update dash license-tool-plugin to 1.0.2
  Also add suppressed exception if unchecked exception occurs in finally
  Candidate: use "Objects.equals" instead of "=="
  Use hamcrest 2.2 directly from Maven Central
  Use commons-logging directly from Maven Central
  Update jna to 5.13.0
  Use bytebuddy directly from Maven Central
  Use jna directly from Maven Central
  Use net.i2p.crypto:eddsa directly from Maven Central
  Use org.tukaani:xz directly from Maven Central
  Use args4j directly from Maven Central
  Use gson directly from Maven Central
  Remove unused $NON-NLS-1$
  Remove unused API filters
  Switch to Apache MINA sshd 2.10.0
  [releng] API filter for PackIndex.DEFAULT_WRITE_REVERSE_INDEX
  PackExt: add a #getTmpExtension method
  UploadPack: Record negotiation stats on fetchV2 call
  RewriteGeneratorTest: Introduce test cases for the RewriteGenerator
  PackWriter: write the PackReverseIndex file

Change-Id: I6c7760a32545320862abcdcc8761c9b728e78182