Update git submodules

Update git submodules

* Update docs/submodules/parser from branch 'master'
  - Add dependency for openstackcleint

    Currently, the ci test result is error after the functest team modified
    the parser dockerfile.
    ========= 1/4. Preparing VM image for parser... =========
    Download image cirros-0.3.5-x86_64-disk.img...
    ./functest_run.sh: line 72: openstack: command not found
    Registe image cirros-0.3.2-x86_64-uec...
    ./functest_run.sh: line 79: openstack: command not found
    Clean-up the environment...
    ./functest_run.sh: line 243: openstack: command not found
    Delete local image file cirros-0.3.2-x86_64-uec.img after test.
    Delete local URL image file cirros-0.3.5-x86_64-disk.img after test.
    ./functest_run.sh: line 275: openstack: command not found
    Delete user parser's role from project parser
    ./functest_run.sh: line 283: openstack: command not found
    Delete user parser
    ./functest_run.sh: line 290: openstack: command not found
    Delete project parser
    ./functest_run.sh: line 295: openstack: command not found
    ======================={ Parser functest end }==========================

    it need to add python-openstackclient requirement in parser project.

    JIRA: PARSER-166

    Change-Id: I8b38325c602b508823d36709a93b1dd8739156f9
    Signed-off-by: shangxdy <shang.xiaodong@zte.com.cn>