Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Fix for when requiretty is disabled with a !"
  - Fix for when requiretty is disabled with a !

    you can disable requiretty by !requiretty or #requiretty
    so catch both of those cases

    Change-Id: Ic7fb1cf97849258b1e4db34be82794918bf722e0
    Signed-off-by: agardner <agardner@linuxfoundation.org>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 1e071cd..7815bb5 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 1e071cdf92857ed6c419da49a332ab477c833ae7
+Subproject commit 7815bb5f470e717ff42c1ee5a18286fd74dd42c9