Update tracked submodules -> HEAD on Mon Dec 10 16:57:36 UTC 2018 (#1015)
Update tracked submodules -> HEAD on Mon Dec 10 16:57:36 UTC 2018 (#1015)

Merged PR #1015.

GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules,GoogleCloudPlatform/magic-modules