Update git submodules

* Update plugins/plugin-manager from branch 'master'
  to 86f7ec61a9785df246f653a1336520b9607399b1
  - Add replication-api to the list of core plugins
    
    Depends-On: https://gerrit-review.googlesource.com/c/gerrit/+/431080
    Change-Id: Ia2141535fc54847011f79b326c3b223dd6418487
    

plugins/plugin-manager

diff --git a/plugins/plugin-manager b/plugins/plugin-manager
index 53d615a..86f7ec6 160000
--- a/plugins/plugin-manager
+++ b/plugins/plugin-manager
@@ -1 +1 @@
-Subproject commit 53d615a6286d1ca1fdca7dc84eee42b4e63fc70d
+Subproject commit 86f7ec61a9785df246f653a1336520b9607399b1