Update git submodules

* Update docs/submodules/policy/apex-pdp.git from branch 'master'
  to b804d0b81b2f6be2561b7606cf67fbad37928307
  - Add NSS libraries to images

    Alpine OpenJDK was updated 2 days ago (3/14), this
    upgrade seems to break java applications that depend on libnss*.so
    OS libraries, which seem are no longer installed with the jdk.

    Added some other libraries to aid when debugging.

    Change-Id: I80ba6a4e145f107219f4380da1cb90ede5ccc056
    Issue-ID: POLICY-1604
    Signed-off-by: Jorge Hernandez <jorge.hernandez-herrero@att.com>

diff --git a/docs/submodules/policy/apex-pdp.git b/docs/submodules/policy/apex-pdp.git
index 67a0e62..b804d0b 160000 (submodule)
--- a/docs/submodules/policy/apex-pdp.git
+++ b/docs/submodules/policy/apex-pdp.git
@@ -1 +1 @@
-Subproject commit 67a0e6203f7f09656ede0fb1a0f589616173bccf
+Subproject commit b804d0b81b2f6be2561b7606cf67fbad37928307