Update git submodules
* Update tripleo-quickstart from branch 'master'
- Merge "New CI job: support docker registry from another job"
- New CI job: support docker registry from another job
Set docker registry to registry_ip_address if it is received from
Zuul. It means there is job that built containers.
For now support only master.
Also enable gating repo if it's set from Zuul.
Change-Id: If4a9ef9c1836ed3dc1bafc3fe7a7b7a550885e80
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