Bumped Solr version to 4.7.0
Convert CompoundTaskExecutionTest to Java
Add failure-condition tests to CompoundTaskExecutionTest
Miscellaneous tidies
Merge pull request #1246 from grkvlt/fix/solr-version

Bumped Solr version to 4.7.0
Merge pull request #1245 from sjcorbett/more-task-tests

More task tests