Unify checks for TF backend

Method of checking already presented in the tempest.
We can only reuse it.

Related-Prod: PRODX-37464
Change-Id: I5e75582081843a0530094c4f2ee0ce32360b31c0
(cherry picked from commit 7fcab05728f4cefdb2691df983444d2c204c0eeb)
(cherry picked from commit 028d1778d63cef6c06a1a4d6fb518aa82af75b98)
1 file changed