Update git submodules
* Update oslo.upgradecheck from branch 'master'
- Merge "Separate opt registration from command running"
- Separate opt registration from command running
In some scenarios, it is useful for the caller of upgradecheck
to be responsible for parsing the conf (see [1]). Since
registering command line options must come before parsing,
we must separate registation from running the commands.
This change enables that by making `register_cli_options` public
and extracting a public `run` method. `main` continues to work
as before by calling these new methods.
[1] I2eea00343d1bbdf486985daeaf6707358b6a2708
Change-Id: I3d7e28d2432f5b04d4154793025786dc289b0cb2
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