[maven-release-plugin] prepare release testdroid-run-in-cloud-1.0.20
[maven-release-plugin] prepare release testdroid-run-in-cloud-1.0.20

snieguu/testdroid-run-in-cloud-plugin,szprutamich/testdroid-run-in-cloud-plugin,szprutamich/testdroid-run-in-cloud-plugin,snieguu/testdroid-run-in-cloud-plugin