Update git submodules

* Update docs/submodules/parser from branch 'stable/fraser'
  - Modify user guide for Frase

    Update user guide for nfv-toscaprser

    JIRA: PARSER-177

    Change-Id: I68f65c37c4e0c69627467a4c2e1814183638535e
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>
    (cherry picked from commit 42787489b278624f2204a58292dcafa5d69c0274)

diff --git a/docs/submodules/parser b/docs/submodules/parser
index c53e9d9..1f8a48d 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit c53e9d9167354169e1fd216ec9b91facfc54b2ae
+Subproject commit 1f8a48db426982b26237188881cb4e5bd0011d35