anchor.diff:  if the descriptor is referencing an external file.
   * `files` : The files property is a CopySpec that defines additional files to be included in the plugin archive.
   * `archiveName` : The archiveName property defines the name of the plugin archive output by the `agentPlugin` task.
  -Defaults to the name of the root project with '-agent' appended and the project version.
  +Defaults to the name of the project, if the `teamcity-agent` plugin and `teamcity-server` plugin are applied to
  +the same project the agent plugin archive is appended with '-agent' and the project version.
   
   The plugin descriptor properties are shown in the examples below and described in the TeamCity documentation for
   {uri-agent-descriptor}[Agent-Side Plugin Descriptor]
  
positive.code: if the descriptor is referencing an external file.
  * `files` : The files property is a CopySpec that defines additional files to be included in the plugin archive.
  * `archiveName` : The archiveName property defines the name of the plugin archive output by the `serverPlugin` task.
  Defaults to the name of the root project and the project version.
  
  The plugin descriptor properties are shown in the examples below and described in the TeamCity documentation for
  {uri-server-descriptor}[Server-Side Plugin Descriptor]
  
negative.code: 
  * `deployTo<environment>` : Deploys one or more plugin archives to the TeamCity server for the environment, requires
   the environment `dataDir` property. If the environment is using TeamCity version 2018.2 or later and the server is
   running, the deploy task will disable and enable the plugin.
  * `undeployFrom<environment>` : Un-deploys one or more plugin archives from the TeamCity server for the environment, requires the environment `dataDir` property.
  * `start<environment>Sever` : Starts the TeamCity Server for the environment, requires the environment `homeDir` and `dataDir` properties to be defined.
  * `stop<environment>Server` : Stops the TeamCity Server for the environment, requires the environment `homeDir` property to be defined.
  