Merge pull request #31 from usergrid/USERGRID-2862-limitfix

Usergrid 2862 limitfix
Merge pull request #32 from usergrid/USERGRID-2862-limitfix

Fixes NPE issue in the union iterator
Fixes export class path issue
Fixed off by 1 issue with loading too many pages.
Changed page size to create issue.  Need to update test to work with page size of 1k to create the problem
Fixes advance logic and page count in merge iterator.  Fixes reset in Union iterator
Refactored check next logic
Fixes off by 1 error at root iterators
Fixes query processor size and test to work correctly with the 1k defaults