IMPALA-6298: Skip test_profile_fragment_instances on local filesystem
IMPALA-6298: Skip test_profile_fragment_instances on local filesystem

test_profile_fragment_instances was recently added to verify that the
final runtime profile for a query has the expected fragments and exec
nodes. The test fails on local filesystem builds, though, as it
assumes there will be 3 impalads and therefore 3 fragment instances,
but there is only 1 impalad on local filesystem builds.

The fix is to disable the test on local filesystem builds.

Change-Id: I2c98f160406081626f17709809b8efee9eae1450
Reviewed-on: http://gerrit.cloudera.org:8080/8809
Reviewed-by: Michael Brown <97e4d5d0e400e5ad37382425ea95bde8b3933403@cloudera.com>
Reviewed-by: Philip Zeyliger <3ba3974e96044dcde818e6310ed799abe10671d4@cloudera.com>
Tested-by: Impala Public Jenkins

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala