Added mlockall setting to process info output
Don't use mock wrapper on relocate stress test for now since it could be the reason for intermediate/occational failures
initial commit of the aggregations module

Closes #3300
force default codec
reduce p/c searches and num child docs being generated
initial commit
moved ParentConstantScoreQuery over to parent ordinals
refresh ordinals via IndicesWarmer instead of in query
made random tests work
added abstraction over parent ordinals