Add tests for share type availability_zones extra-spec

These tests are skipped for API versions < 2.48.

Change-Id: I69ec5935c2635008af8fcf5de841ee498940e978
Partially-implements: bp share-type-supported-azs
Depends-On: https://review.openstack.org/#/c/633155/
diff --git a/manila_tempest_tests/config.py b/manila_tempest_tests/config.py
index b49fd32..9d891ec 100644
--- a/manila_tempest_tests/config.py
+++ b/manila_tempest_tests/config.py
@@ -30,7 +30,7 @@
                help="The minimum api microversion is configured to be the "
                     "value of the minimum microversion supported by Manila."),
     cfg.StrOpt("max_api_microversion",
-               default="2.47",
+               default="2.48",
                help="The maximum api microversion is configured to be the "
                     "value of the latest microversion supported by Manila."),
     cfg.StrOpt("region",