Envvar for Impala test cluster base cgroup hierarchy
Envvar for Impala test cluster base cgroup hierarchy

Allows the base cgroup hierarchy path used by the impala
test cluster to be specified with the environment variable
IMPALA_CGROUP_BASE_PATH. This is needed to support older
kernels that do not use the proper default cgroup path
and do not even support finding the hierarchy via mount.

This will be used in jenkins test runs with RM enabled
which run on Centos6 images.

Change-Id: I30984a58fbcf990410f75f7feb5c1d549afa6ddd
Reviewed-on: http://gerrit.cloudera.org:8080/397
Reviewed-by: Casey Ching <77bc9a9984e6786c5799d7a71768cf023120ef76@cloudera.com>
Tested-by: Internal Jenkins

ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC,ibmsoe/ImpalaPPC