LU-11607 tests: replace version/fstype calls in sanity/n

LU-11607 tests: replace version/fstype calls in sanity/n

The routine get_lustre_env() is available to all Lustre
test suites and sets an environment variable for the file
system type for MDS1 and OST1 and sets a variable for the
Lustre version of servers.

Replace the calls to facet_fstype() and lustre_version_code()
for all server types defined in get_lustre_env().  While
doing this, replace SINGLEMDS with mds1 in these calls.

Clean up around any modifications with
- converting spaces to tabs
- removing calls to return after skip() or skip_env()

Test-Parameters: trivial testlist=sanityn
Test-Parameters: fstype=zfs testlist=sanityn,sanity
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: Ibc66220ae3b57cf22395d13f5d35feceeb61adfe
Reviewed-on: https://review.whamcloud.com/35719
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Emoly Liu <emoly@whamcloud.com>