Commit [r8106] Maximize Restore History

Removing test cases that did not actually compare against ground truth. Both of these tickets have test cases against ground truth in TestUnions of the data driven AST evaluation test suite.

See #831
See #874

thompsonbry 2014-04-11

removed /branches/BIGDATA_RELEASE_1_3_0/bigdata-sails/src/test/com/bigdata/rdf/sail/TestTicket831.java
removed /branches/BIGDATA_RELEASE_1_3_0/bigdata-sails/src/test/com/bigdata/rdf/sail/TestTicket874.java