Update git submodules

* Update docs/submodules/parser from branch 'stable/euphrates'
  - Update notes for release E

    Update userguide and release-notes

    JIRA:PARSER-163

    Change-Id: I3b15aa40afcb86a415997fc7e2471894bf3c9f06
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index 9fe6e07..3447589 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit 9fe6e07e6180c49e6eda3e6cabb339064709180c
+Subproject commit 3447589a78375d4dab41608a3504f56a6e4ac9c9