Update git submodules

* Update docs/submodules/so.git from branch 'dublin'
  to 864ce56c3daff6a6a1f4b9ae1ebcb24c2aa87f2a
  - Merge "Add SO Update the repeatable Macro - northbound_request_ref_lookup" into dublin
  - Add SO Update the repeatable Macro - northbound_request_ref_lookup

    Added dublin - Update repeatable Macro not to lose the ability to
    drive flows differently based on service type.
    UPDATE northbound_request_ref_lookup SET SERVICE_TYPE = '*' WHERE SERVICE_TYPE = NULL;
    Issue-ID: SO-1892
    Signed-off-by: Bonkur, Venkat (vb8416) <vb8416@att.com>
    Change-Id: I3fa58559fe4596b3a0e184a8391ac93fb9496a26

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 338c7e7..864ce56 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 338c7e73b789c0a6d95081ab1a13ae7baf00f950
+Subproject commit 864ce56c3daff6a6a1f4b9ae1ebcb24c2aa87f2a