Update integration_config.json in README
Update integration_config.json in README

To include new properties for proxy api acceptance test [#85088910]

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