Update tempest pin to latest commit ref

Also updated invocation of DynamicCredentialsProvider to supply
necessary parameters.

Change-Id: Ie24bc69402964af3d756c1548aed86cc53c272c4
1 file changed
tree: d76fa4cdd813dfca8344c933f3779dce5bea0a9c
  1. manila_tempest_tests/