Merge branch 'stable-2.15' into stable-2.16

* stable-2.15:
  Upgrade bazlets to latest stable-2.15
  Upgrade bazlets to latest stable-2.14
  Fix typo in CachePatte{r}nMatcherTest name
  Do not propagate ldap_groups cache evictions

Change-Id: Ice0f106b7d742ff09e87b2646e8c5a395bce54d3