Update git submodules

* Update docs/submodules/parser from branch 'master'
  - 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>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index cabfeec..4278748 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit cabfeecb3259c5e22488756d91b6f72d27c4c18a
+Subproject commit 42787489b278624f2204a58292dcafa5d69c0274