LU-11607 tests: replace lustre_version/fstype - full

LU-11607 tests: replace lustre_version/fstype - full

The routine get_lustre_env() is available to all Lustre test
suites and sets an environment variable for the Lustre
version of installed on servers and clients.

Replace calls to lustre_version_code() and facet_fstype()
for all server types with definitions from get_lustre_env()
for the racer, replay-dual, replay-vbr and sanity-lsnapshot
test suites.

While doing this, replace ‘$SINGLEMDS’ with ‘MDS1_VERSION’
in lustre_version_code() and facet_fstype().

Clean up around any modifications by removing calls to
return after skip() or skip_env() and converting spaces to
tabs.

Test-Parameters: trivial fstype=ldiskfs testlist=replay-vbr,sanity-lsnapshot
Test-Parameters: fstype=zfs testlist=replay-vbr,sanity-lsnapshot
Test-Parameters: fstype=ldiskfs testlist=racer,replay-dual
Test-Parameters: fstype=zfs testlist=racer,replay-dual
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I4581ccf98b9da256a00f24a2da8cd8ff41f115ca
Reviewed-on: https://review.whamcloud.com/36375
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>
Reviewed-by: Wei Liu <sarah@whamcloud.com>