Release google-http-java-client v1.27.0 (googleapis#527)

* Release v1.27.0

* Fix `@since` javadoc for new write timeout features

* Fix VERSION constant

* Fix version annotations in google-http-client-android-test artifact

* Fix line length

* Cleanup output and fix plugin versions

* Change order of deployed assets

* Add nexus-staging-maven-plugin and release profile to bom

* Put the pom last again

* bom needs a developers section

Release google-http-java-client v1.26.0 (googleapis#495)

* Release v1.26.0

* Fix samples version annotations

* set maven memory limits for tests

* Fix ordering of modules so deploy can happen

* Fix straggler versions for assembly

Add plugin configuration to maven-release-plugin

Add plugin configuration to maven-release-plugin

Add plugin configuration to maven-release-plugin

Add plugin configuration to maven-release-plugin

Add plugin configuration to maven-release-plugin

Add plugin configuration to maven-release-plugin

Remove links to googlecode

Add plugin configuration to maven-release-plugin