Update git submodules

* Update docs/submodules/snaps from branch 'master'
  - Added additional check for the returned project object is not None.

    There were 3 other instances of this check in neutron_utils.py but
    this one was missed and could potentially cause issues.

    Change-Id: I599e63e14a9b08ba34f50e060c7dfa5fbdd631f7
    Signed-off-by: spisarski <s.pisarski@cablelabs.com>

diff --git a/docs/submodules/snaps b/docs/submodules/snaps
index 0175fee..150aec4 160000 (submodule)
--- a/docs/submodules/snaps
+++ b/docs/submodules/snaps
@@ -1 +1 @@
-Subproject commit 0175feef9f00ea7595e4f7cc13f3b7a9c26e9a02
+Subproject commit 150aec40c506dc3f7bdf182977898575c019593e