add version 1.2.0 of blue green deploy plugin
add version 1.2.0 of blue green deploy plugin

cloudfoundry-incubator/cli-plugin-repo,guidowb/cli-plugin-repo,kkellner/cli-plugin-repo,brybwy/cli-plugin-repo,kkellner/cli-plugin-repo,kkellner/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,guidowb/cli-plugin-repo,brybwy/cli-plugin-repo,brybwy/cli-plugin-repo,guidowb/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,guidowb/cli-plugin-repo,brybwy/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo