[maven-release-plugin] prepare release aws-credentials-1.9
[maven-release-plugin] prepare release aws-credentials-1.9

jenkinsci/cloudbees-aws-credentials-plugin,jenkinsci/cloudbees-aws-credentials-plugin,jenkinsci/aws-credentials-plugin,mattstep/aws-credentials-plugin,jenkinsci/aws-credentials-plugin,mattstep/aws-credentials-plugin