Update git submodules

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>