Update git submodules

* Update docs/submodules/so/libs.git from branch 'master'
  to 87a5aa100306535a4694a689c5b73348f1c9bb57
  - Merge "Replace the type specification in this constructor call with the diamond operator"
  - Replace the type specification in this constructor call with the diamond operator

    In Entity.Java replace the type specification in this constructor call with the diamond operator and in OpenStackResponseException.java make "response" transient or serializable.

    Issue-ID: SO-1490

    Change-Id: I9653e42607ca898b5003d4b6050b69e58720ae62
    Signed-off-by: Isaac Manuel Raj <isaac.manuelraj@huawei.com>

diff --git a/docs/submodules/so/libs.git b/docs/submodules/so/libs.git
index e8e3627..87a5aa1 160000 (submodule)
--- a/docs/submodules/so/libs.git
+++ b/docs/submodules/so/libs.git
@@ -1 +1 @@
-Subproject commit e8e3627f001e1c82f961a7f2fc491855cb2d621f
+Subproject commit 87a5aa100306535a4694a689c5b73348f1c9bb57