Mohammed Naser fb2d0ce925 Add repo_build pip cache
The repo_build role is not using the cache provided by the OpenStack
infrastructure team, make it use it.

Depends-On: I2e42ef4022aaaa2e1cb9f461e63ce2e9e1f49511
Depends-On: I3df2c670beeb78baaa1515bcd27e8f2b0d95b3a9
Change-Id: I0bec4400ebfcb4bf472c58554ee19525be658a40
2018-06-24 12:09:55 -04:00
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