NCBO-460 SPARQL delete all in TestCase
NCBO-460 test modifications for fast ontology deletion
NCBO-460 avoid deleting enum types and users
NCBO-460 higher limit on triples to limit
Revert "NCBO-460 avoid deleting enum types and users"

This reverts commit 4c52c320f81a2fecd84c1c9c14b29d39d4afd1c9.

Conflicts:
	test/test_case.rb
corrected name in SDO test and tear down out
NCBO-460 added enum times init
remove skip parsing flags
NCBO-460 fast delete ontologies in mapping tests
NCBO-460 skip heavy tests env variable
NCBO-460 more performant option to count triples