Remove Manual Tasks from OCP App Testing

Problem: Testing an app version in a sandbox account requires few steps now: bumping dev version (can be automated with a flag to ‘ocp app prepare’), building and publishing (can be one command), installing to test account or waiting for auto-upgrade. These are at least two commands, sometimes more.
Solution: add a single command to OCP CLI to build and test an app in a sandbox account. Command: ocp app sandbox-test <TRACKER-ID>. The command starts from making sure the version is correct, changes the version if needed (prompts user for confirmation if makes sense), then it builds the app and waits for the build to be completed, then it installs the app to the ODP account or waits for auto-upgrade is applicable. At the end it lists test options: function URLs, jobs, etc.
Impact: speeds up development, reduces churn