title: variable template name is dynamic
body: <p>I want to refer to template file as shown below:</p>
  <pre><code>variables:
    - template: code-quality/code-quality-variables['Build.Repository.Name'].yml
    #- template: code-quality/code-quality.yml
  </code></pre>
  <p>How can I access the template file name dynamically based on the repository name?</p>
  <p><code>variables['Build.Repository.Name']</code> is taken as-is instead of resolving it dynamically in azure pipeline.</p>
  <p>I also tried to do this using a parameter</p>
  <pre><code>- name: codeQuality
    type: string
    default: concat('code-quality/code-quality', '-', variables['Build.Repository.Name'])
  </code></pre>
  <p>**</p>
  <p>Also, in parameters is it possible to refer to a dynamic variable name?</p>
  <pre><code>qualityEnabled: ${{variables.variables['Build.Repository.Name']_allowQuality}}
  #qualityEnabled: ${{variables.repositoryname_allowQuality}}
  </code></pre>
  <p>I want the variable name <code>variables['Build.Repository.Name']_allowQuality</code> to be resolved as respectiverepositoryname_allowQuality</p>