LU-10447 tests: replace $SET/$GETSTRIPE in replay tests

LU-10447 tests: replace $SET/$GETSTRIPE in replay tests

$SETSTRIPE and $GETSTRIPE were needed when we used the
standalone 'lstripe' utility. 'lstripe' hasn't been used
for years and we need to clean up all remnants of it.

Replace all instances of $SETSTRIPE with '$LFS setstripe'
and $GETSTRIPE with '$LFS getstripe' in the replay-dual,
replay-ost-single, and replay-single test suites.

Test-Parameters: trivial testlist=replay-dual,replay-ost-single,replay-single
Signed-off-by: James Nunez <jnunez@whamcloud.com>
Change-Id: I3902142061ddb3c8860b6983d5ec55383aeb25a9
Reviewed-on: https://review.whamcloud.com/33918
Reviewed-by: Elena Gryaznova <c17455@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Wei Liu <sarah@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>