Add ability to specify dependent jobs in trigger

This patch allows to configure dependent jobs for trigger, which
is especially usefull for case when multiple jobs are triggered
from gerrit.

There is pillar example:
  job:
    myjob:
      trigger:
        gerrit:
          dependency_job_names:
            - job1

* Fix test pillars to use java 11 as 10 is no longer awailable for
download

Change-Id: I7e4c3f08418a3adcb2a041077a25c2a6b752cb0b
diff --git a/README.rst b/README.rst
index d041702..d21f47f 100644
--- a/README.rst
+++ b/README.rst
@@ -217,6 +217,9 @@
                 name: "Jenkins Docker Image"
             trigger:
               timer:
+                dependency_job_names:
+                  - job1
+                  - job2
                 spec: "H H * * *"
               github:
               pollscm: