Update git submodules

* Update docs/submodules/policy/apex-pdp.git from branch 'master'
  to 70611fc67629b4ab0c7db4104d6a26a0645dac0a
  - Policy JSON formatting issues in APEX

    In APEX, the policy model currently needs to be escaped, otherwise
    causes json formatting issues. This is fixed.

    Change-Id: If9d5043acef0b175494be797fc7acd9c6c4f4494
    Issue-ID: POLICY-1839
    Signed-off-by: a.sreekumar <ajith.sreekumar@est.tech>

diff --git a/docs/submodules/policy/apex-pdp.git b/docs/submodules/policy/apex-pdp.git
index 3f53167..70611fc 160000 (submodule)
--- a/docs/submodules/policy/apex-pdp.git
+++ b/docs/submodules/policy/apex-pdp.git
@@ -1 +1 @@
-Subproject commit 3f53167d98e00198c15c950d9b7ba4ea8b4a4c05
+Subproject commit 70611fc67629b4ab0c7db4104d6a26a0645dac0a