Update git submodules

* Update docs/submodules/parser from branch 'master'
  - Merge install and test script

    Merge installation and test script because functest will not called the
    script of parser_install.sh, and only call the script of
    functest_run.sh.

    JIRA: PARSER-130

    Change-Id: I452010f0d635dfbd9fb802743f3b858d66b72b32
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index 9949c43..15591ae 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit 9949c43eaa7258e83976291a3957a7e17b51e712
+Subproject commit 15591ae4c8c1260c37631526b5e18ebe84770e36