Update git submodules

* Update oslo.config from branch 'master'
  - Merge "Convert rst to plaintext for oslo.config output"
  - Convert rst to plaintext for oslo.config output
    
    This lets us use powerful rST roles and directives in our help text
    without these being emitted to the configuration file, where they don't
    read quite as well. It also fixes our formatting somewhat, which is
    nice.
    
    Note that we're doing something funky where we disable line wrapping. We
    can't totally disable this due to how rst2txt works, so instead we set
    the line length to an arbitrarily long line length, which is taken from
    RFC5322 (Internet Message Format) for want of something better. I
    personally question whether anyone is configuring this, but that's a
    fight for another day.
    
    Also note that this might caught issues for people who are using invalid
    rST in their docstrings or use roles/directives in their config options
    that aren't part of the standard Sphinx set or oslo.config set. They
    will already be seeing the former issues if they are using the
    'sphinxext' extension though, and the latter sounds like it would be
    fairly rare.
    
    Change-Id: I6c7208f0facfb4f334d7440cb6a9562901543dd3
    Signed-off-by: Stephen Finucane <sfinucan@redhat.com>

oslo.config

@@ -1 +1 @@
-Subproject commit dce2afd7898d618336e1859283bcedea8336a7a2
+Subproject commit 445f1c42d90a5c36403c5420aeca797c7a666325