Update pom.xml

The configured dependency version for pact-array-datamodel should be the same as the one of the enclosing project.
Merge pull request #29 from aalexandrov/patch-1

Update pom.xml
Implemented reopenable hash join.
Fixed startup scripts to include extended hadoop dependencies in the classpath.
Merge branch 'master' of https://github.com/dimalabs/ozone into rmetzger_github_master

Conflicts:
	CONTRIBUTORS