Update git submodules
* Update python-saharaclient from branch 'master'
- Merge "Remove Babel requirement"
- Remove Babel requirement
Babel is not needed as requirement, remove it.
See also
http://lists.openstack.org/pipermail/openstack-discuss/2020-April/014227.html
Change-Id: Ifd51020aabf265eada1f667713013a3a6176c659
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