Update git submodules

* Update docs/submodules/parser from branch 'master'
  - Support metadata validation

    When import service template, validata metadata validation in
    tosca_type_validation

    JIRA: PARSER-136

    Change-Id: Ibb4a51e734c43364d92520f14f998ecf54789631
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>

diff --git a/docs/submodules/parser b/docs/submodules/parser
index 59e3768..d3b0c13 160000 (submodule)
--- a/docs/submodules/parser
+++ b/docs/submodules/parser
@@ -1 +1 @@
-Subproject commit 59e3768ddbb38c31c43d9a626124b923cd0ac8d8
+Subproject commit d3b0c13441b150eaf5898ccf39c0ecee74a19da1