xci: get-opnfv-scenario-requirements: Fix local scenario sync

xci: get-opnfv-scenario-requirements: Fix local scenario sync

Commit 07747a53901e550280afb421b6fcbebc8994e93a ("xci: playbooks: Fix
synchronization of external scenarios") fixed copying of external
scenarios but broke internal ones because the regexp was wrong. The
variable was not evaluated properly so nothing was replaced for internal
scenarios. This also fixes a problem when the scenario and the role
names differ so we make sure that the role with the correct name is
created.

Change-Id: Idd7590d972841b5c03286b34757d7325b863c6bf
Signed-off-by: Markos Chandras <mchandras@suse.de>