Update git submodules

* Update plugins/plugin-manager from branch 'master'
  to 44808dcad3c978ed12bb2cb454c6ad320912aa8a
  - Remove commons:lang3 and use the one from core
    
    The commons:lang3 dependency is now part of the standard
    dependencies and therefore does not need to be explicitly
    mentioned in the plugin's BUILD file.
    
    Change-Id: I257eb6ccc7feafd5686b189341475d0ebfdb0607
    
diff --git a/plugins/plugin-manager b/plugins/plugin-manager
index ea992c3..44808dc 160000
--- a/plugins/plugin-manager
+++ b/plugins/plugin-manager
@@ -1 +1 @@
-Subproject commit ea992c3b37eed5493c7031ee20faba9dd875170f
+Subproject commit 44808dcad3c978ed12bb2cb454c6ad320912aa8a