Bump ruby-version to 2.2.0
Bump ruby-version to 2.2.0

- to fix pre-packaging issue in CI.

[#91745146]

krishna-mk/cf-mysql-release,kbastani/cf-mysql-release,CloudCredo/cf-mysql-release,CloudCredo/cf-mysql-release,cloudfoundry/cf-mysql-release,CloudCredo/cf-mysql-release,krishna-mk/cf-mysql-release,cloudfoundry/cf-mysql-release,kbastani/cf-mysql-release,cloudfoundry/cf-mysql-release,kbastani/cf-mysql-release,cloudfoundry/cf-mysql-release,krishna-mk/cf-mysql-release