Update git submodules

* Update docs/submodules/calipso from branch 'master'
  - container change sensu->monitor

    Change-Id: I06f6882d371fe09a5a3819f0b06b96a2c858a870
    Signed-off-by: Koren Lev <korenlev@gmail.com>

diff --git a/docs/submodules/calipso b/docs/submodules/calipso
index 2e47d87..d8f7570 160000 (submodule)
--- a/docs/submodules/calipso
+++ b/docs/submodules/calipso
@@ -1 +1 @@
-Subproject commit 2e47d8704fa0fe56ced38ddb4fc94f111079bd82
+Subproject commit d8f75705138a283b080394d7fdd2a83512cfe939