The lshowmount utility was removed via patch http://review.whamcloud.com/10510 "LU-2675 utils: remove unused utilities" in Lustre 2.7.0 but as users move to this new release there have been a number of users that have requested for it to be restored.
There is an existing patch http://review.whamcloud.com/17593 "LU-2675 utils: restore lshowmount utility" to restore the functionality, but it was being tracked under the closed LU-2675 ticket and not getting any attention. The patch needs a small amount of work to be fixed in the test case and to use the new get_param code.