Adds unit test for #5099

This tests whether the total group count return by BP_Groups_Group::get() is
correctly calculated when using meta_query

See #5099

Props r-a-y

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7274 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Fixes total group count for BP_Groups_Group::get() when using meta_query

The fix contained in this changeset is intended to be temporary. A longer-term
fix will mean refactoring the way that total-group queries are composed, so
that the get() method does not have to assemble these queries twice.

See #5099

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7275 cdf35c40-ae34-48e0-9cc9-0c9da1808c22