Allow to deploy only master or only dev

[ibm-cloud]

Allow to deploy only master or only dev

[l2fprod]

@uwefassnacht @rvennam

what do you think of this change?

Still allow us to setup a "dev" and a "prod" pipelines for our own use while making the default configuration simpler for most users who just want to deploy their own demo.

You can try it:
https://console.ng.bluemix.net/devops/setup/deploy/?repository=https%3A//github.com//IBM-Bluemix/insurance-toolchain.git&branch=deploy-one-branch

[l2fprod]

Goal
Less apps to deploy

Changes

Allow to specify the branch name to build

Default to master. A user can click the "create toolchain" button in the github page and then the "create" button in the DevOps page to get a working system.

Less apps in toolchain

and the branch name is shown in pipeline name.

[uwefassnacht]

I think this looks good. Let me try it this week and change the script.