Change openjdk baseOS img to integration-java11

Change openjdk baseOS img to integration-java11

This change should not have any effects on functionality as
integration-java11:7.0.0 image is built on top of
openjdk:11.0.6-jre-slim.

Benefits from switching over:
* minimal {java11,python} images maintained by integration team
* using currently "blessed by seccom" versions (if :latest tag used)
* should limit spread of legal issues across layers
* integration images will be the first to have automated compliance
  documentation
* should limit spread of base layers (contributing to deployment
  footprint - more base layers = more to download, more to store etc...)

Issue-ID: INT-1864
Signed-off-by: Alexander Mazuruk <a.mazuruk@samsung.com>
Change-Id: Ifc4eb87c77e4742562a4b43a803ded0c646bad50