Fix incorrect variable names in test_total_member_count_groups_leave_group()

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7499 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Fix incorrect variable names again

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7500 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Use time() instead of gmktime() with no arguments

This is for E_STRICT compliance (since gmktime() with no argument uses time()
internally).

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7501 cdf35c40-ae34-48e0-9cc9-0c9da1808c22