Allow to set share visibility using "manage" API

This fix allows manila manage command to explicitly
set visibility (key '--public') similar to using API
"create".

Change-Id: I8725719b8c7ff5557fa20ebbb5314f3e770ffcc0
Closes-Bug: #1436865
diff --git a/manila_tempest_tests/config.py b/manila_tempest_tests/config.py
index 63b3211..ddf11cd 100644
--- a/manila_tempest_tests/config.py
+++ b/manila_tempest_tests/config.py
@@ -36,7 +36,7 @@
                help="The minimum api microversion is configured to be the "
                     "value of the minimum microversion supported by Manila."),
     cfg.StrOpt("max_api_microversion",
-               default="2.7",
+               default="2.8",
                help="The maximum api microversion is configured to be the "
                     "value of the latest microversion supported by Manila."),
     cfg.StrOpt("region",