commit 122accc0f088e323f03c9af2ca87f1bfa3aad711
Author: Alex Schultz <aschultz@redhat.com>
Date:   Thu Oct 1 14:05:02 2020 -0600

    Quote lookup var
    
    Since the key includes colons, we need to quote it so yaml stops trying
    to interpret it as an element.
    
    Change-Id: I04c24936bbff9f9ceea72f71e6e7798b4a2a39aa
    Closes-Bug: #1898113

diff --git a/overcloud.j2.yaml b/overcloud.j2.yaml
index e690260..2c7699a 100644
--- a/overcloud.j2.yaml
+++ b/overcloud.j2.yaml
@@ -829,7 +829,7 @@ resources:
               - {get_param: {{role.name}}SchedulerHints}
           ServiceNames: {get_attr: [{{role.name}}ServiceNames, value]}
           ServiceMetadataSettings: {get_attr: [{{role.name}}ServiceChainRoleData, value, service_metadata_settings]}
-          OVNBridgeMappings: {get_attr: [{{role.name}}ServiceChainRoleData, value, config_settings, ovn::controller::ovn_bridge_mappings]}
+          OVNBridgeMappings: {get_attr: [{{role.name}}ServiceChainRoleData, value, config_settings, 'ovn::controller::ovn_bridge_mappings']}
           DeploymentServerBlacklistDict: {get_attr: [DeploymentServerBlacklistDict, value]}
           RoleParameters:
             map_merge: