SimpData: added fix for super-tree issue ISSUE=6218
SimpData: added fix for super-tree issue ISSUE=6218

In cases where none of the groups covers the OID tree we're asking for, but
there were one or more groups that the requested tree covered, we weren't
returning any results. Now, we are.

GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp,GlobalNOC/simp