Fix typo in configure ttl code

Also fixes tox.ini

Change-Id: Ic4c2d34ff248d5429eb604824e42dbaba6ca2678
Closes-Bug: #1939681

hooks/rabbit_utils.py

@@ -884,7 +884,7 @@ def configure_ttl(vhost, ttlname, ttlreg, ttl):
     set_policy(
         vhost,
         '{ttlname}'.format(ttlname=ttlname),
-        '"{ttlreg}"'.format(ttlreg=ttlreg),
+        '{ttlreg}'.format(ttlreg=ttlreg),
         '{{"expires":{ttl}}}'.format(ttl=ttl),
         priority='1',
         apply_to='queues')

tox.ini

@@ -25,7 +25,7 @@ setenv = VIRTUAL_ENV={envdir}
 commands = stestr run --slowest {posargs}
 allowlist_externals =
     charmcraft
-    rename.sh
+    {toxinidir}/rename.sh
 passenv =
     HOME
     TERM

unit_tests/test_rabbit_utils.py

@@ -1067,7 +1067,7 @@ class UtilsTests(CharmTestCase):
             '-p', 'test',
             '--priority', '1',
             '--apply-to', 'queues',
-            'heat_expiry', '"heat-engine-listener|engine_worker"',
+            'heat_expiry', 'heat-engine-listener|engine_worker',
             '{"expires":23000}'
         )