XD-958 Testing path for tmp directory for trailing /
XD-941: Apply to GemFire
XD-941: Apply CP to Gemfire, twitter and splunk
bump Splunk to 1.2.0
Fix twitter module.

twitter modules need some Jackson 1 classes. Note that those can't be
loaded by the module itself if RestTemplate is loaded by Dirt (which is
the case at the moment). Hence, added jackson mapper at Dirt level
XD-945 Adding a beginning of the HDFS store module
XD-907: Add aggregate counter year resolution
XD-957 Update SI Dependency - 4.0.0.BUILD-SNAPSHOT

Mainly just import changes and a method name change on
the ChannelResolver.
XD-961: Fix XML serialization of streams
XD-962: added copylib dependency to test
XD-919 removed json param from twittersearch module
XD-945 Formatting, adding JavaDocs where missing
Fix generics warnings
Merge remote-tracking branch 'trisberg/XD-945'
XD-945 remove log4j.properties per code review
Merge branch 'master' of https://github.com/spring-projects/spring-xd