Versioning cleanup: (#2002)
Versioning cleanup: (#2002)

* Versioning cleanup:
- fix versioning script (grpc.version issue)
- better version resolution (via dependencyManagement instead of usage of properties defined in parent pom as dependencies version)
- should also fix LICENSE resolution by versioneye.com and dependency ci (google-cloud-* moudles should now display correct licenses instead of UKNOWN)
- fix link in readmes to versioneye.com (old link points to 0.7.1 which is not getting updated
- fix security issue dependency in google-cloud-dns
- removed "test" scope in dependencyManagement for various libs (considered bad practice, plus potentially causes an issue with datastore lib)

googleapis/java-trace,googleapis/java-trace,googleapis/java-trace