Update git submodules

* Update docs/submodules/doctor from branch 'master'
  - Merge "Fix host status grep bug and Remove connection_pool argument"
  - Fix host status grep bug and Remove connection_pool argument

    Host status returned the wrong output as the "OS-EXT-SRV-ATTR:host"
    pattern appears twice in the "openstack server show" output.
    The argument connection_pool is deprecated and is not needed.

    Change-Id: Ib107e0bad8084bdf6f77689f112bde04bdb97543
    Signed-off-by: Umar Farooq <umar.farooq@neclab.eu>

diff --git a/docs/submodules/doctor b/docs/submodules/doctor
index 41fc677..9eb18ca 160000 (submodule)
--- a/docs/submodules/doctor
+++ b/docs/submodules/doctor
@@ -1 +1 @@
-Subproject commit 41fc677e7f6349d28ec938fe6ac9ff03e99894f1
+Subproject commit 9eb18cabdddda3a2e0bbd05076bc1786ebe6be8b