Goal: 

Write the script that the Tasks App will use to convert from a CentOS7 host to RHEL7.

In order to run the convert2rhel pre-assessment from a Tasks App, we need to have a script which Insights can send to the client to be executed by the rhc-bash-worker. The script needs to do the following things:

• Configure the client machine to yum install convert2rhel from the public cdn repo
  • Install the certificate to authenticate the cdn
  • Create a yum repo file pointing to the convert2rhel repo on the cdn
• Install convert2rhel if it is not installed
• Update convert2rhel if it is not the most recent package
• If certain optional parameters are present, write them to a protected temporary file
• Run convert2rhel with optional (and mandatory) environment variables and command line arguments
• Delete the temporary config file
• ? Remove the convert2rhel yum repo?
• {}Do not{} remove the certificate for the cdn (unsafe, there could be packages we installed during conversions that use it)
• Output a Beginning of json results marker (TBD)
• Output the json results from the convert2rhel run
• Output the End of json results arker (TBD)
• Script needs to invoke insights-client at the end to update in console in order to have Insights updated on the change of the distribution (CentOS Linux -> RHEL)

Acceptance Criteria:

A list of verification conditions, successful functional tests, or expected outcomes in order to declare this story/task successfully completed.

• A CentOS7 host can successfully be converted to RHEL7 using the script written for this Task.
• The script is signed through the Tasks' process for signing templates and can be verified by insights-client.
• The script has been added to the proper place for use by the Tasks App