mysql-test/t/grant_cache.test:
  replace hard-coded socket paths with variable containing the appropriate path
mysql-test/t/myisam.test:
  replace hard-coded socket paths with variable containing the appropriate path
mysql-test/t/query_cache_notembedded.test:
  replace hard-coded socket paths with variable containing the appropriate path
mysql-test/t/rpl000015.test:
  replace hard-coded socket paths with variable containing the appropriate path
mysql-test/t/rpl000017.test:
  replace hard-coded socket paths with variable containing the appropriate path
mysql-test/t/rpl_rotate_logs.test:
  replace hard-coded socket paths with variable containing the appropriate path