Update git submodules

* Update docs/submodules/parser from branch 'master'
  - Merge "Update heat-translator requirement"
  - Update heat-translator requirement

    Currently heat-translator use openstack tosca-parser other than
    nfv-toscaparser, this patch modifies the requriement since nfv-toscaparser
    has tagged and published to pypi.

    JIRA: PARSER-150

    Change-Id: Ib1ddf28f0932fbe19f25627ad4ef5df2d16dca0a
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index 7c96fb6..96de938 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit 7c96fb6cb02a5bb8f957f7129bf6149e07dfa8c2
+Subproject commit 96de9387460091e7cf0dc5fde1afaa637a8b2b79