Fix functional gate error

1.add execute permission for gate_hook.sh
2.add execute permission for post_test_hook.sh
3.enable all required services in gate_hook
4.temporarily disable ironic related operations in devstack

Change-Id: If11ec8fc31fea40f5ef344d16de581e5cf7aedfb

devstack/gate/gate_hook.sh

@@ -14,8 +14,7 @@
 
 # This script is executed inside gate_hook function in devstack gate.
 
-# TODO(liusheng): will enable ironic services if add more functional tests
-ENABLED_SERVICES="key"
+export OVERRIDE_ENABLED_SERVICES="key,mysql,rabbit,g-api,g-reg,q-svc,q-dhcp,q-meta,q-agt,ir-api,ir-cond,ironic"
 
 # The backend is passed in by the job as the first and only argument
 export DEVSTACK_GATE_INSTALL_TESTONLY=1

devstack/plugin.sh

@@ -208,8 +208,8 @@ if is_service_enabled nimble; then
         start_nimble
         echo_summary "Creating instance type"
         create_instance_type
-        echo_summary "Updating ironic node properties"
-        update_ironic_node_type
+        #echo_summary "Updating ironic node properties"
+        #update_ironic_node_type
     fi
 
     if [[ "$1" == "unstack" ]]; then