Disable shelve/snapshot/cinder when running Tempest with libvirt+lxc

The libvirt+lxc backend in nova does not support shelve, image snapshot
or any volume-related actions (so pretty much anything to do with
cinder), so we need to configure tempest to not run tests that hit those
operations/service when using libvirt/lxc.

This is part of an overall effort to get a CI job running for nova with
the libvirt+lxc configuration per:

Ic07c39e219121ba6b8b20de2b83a193bb735133d

Change-Id: I4decfcc5a5dfbabdecb3eb9fc93f1d1d6c2af805

Author: Matt Riedemann

lib/tempest

@@ -531,6 +531,8 @@ function configure_tempest {
     if [ "$VIRT_DRIVER" = "libvirt" ] && [ "$LIBVIRT_TYPE" = "lxc" ]; then
         iniset $TEMPEST_CONFIG compute-feature-enabled rescue False
         iniset $TEMPEST_CONFIG compute-feature-enabled resize False
+        iniset $TEMPEST_CONFIG compute-feature-enabled shelve False
+        iniset $TEMPEST_CONFIG compute-feature-enabled snapshot False
         iniset $TEMPEST_CONFIG compute-feature-enabled suspend False
     fi
 
@@ -548,6 +550,12 @@ function configure_tempest {
         fi
     done
 
+    if [ "$VIRT_DRIVER" = "libvirt" ] && [ "$LIBVIRT_TYPE" = "lxc" ]; then
+        # libvirt-lxc does not support boot from volume or attaching volumes
+        # so basically anything with cinder is out of the question.
+        iniset $TEMPEST_CONFIG service_available cinder "False"
+    fi
+
     if is_ssl_enabled_service "key" || is_service_enabled tls-proxy; then
         # Use the ``BOTO_CONFIG`` environment variable to point to this file
         iniset -sudo $BOTO_CONF Boto ca_certificates_file $SSL_BUNDLE_FILE