title: maven-scala-plugin giving pom file error
body: <p>I'm testing java code using scala and maven. The maven-scala-plugin is returning a pom file error in Eclipse. Here is my pom snippet : </p>
  
  <pre><code>        &lt;plugin&gt;
              &lt;groupId&gt;org.scala-tools&lt;/groupId&gt;
              &lt;artifactId&gt;maven-scala-plugin&lt;/artifactId&gt;
              &lt;version&gt;2.15.2&lt;/version&gt;
              &lt;executions&gt;
                  &lt;execution&gt;
                      &lt;id&gt;scala-test-compile&lt;/id&gt;
                      &lt;phase&gt;test-compile&lt;/phase&gt;
                      &lt;goals&gt;
                          &lt;goal&gt;testCompile&lt;/goal&gt;
                      &lt;/goals&gt;
                  &lt;/execution&gt;
              &lt;/executions&gt;
          &lt;/plugin&gt;
  </code></pre>
  
  <p>This is the error : </p>
  
  <pre><code>Plugin execution not covered by lifecycle configuration: org.scala-tools:maven-scala-plugin:2.15.2:testCompile 
   (execution: scala-test-compile, phase: test-compile)
  </code></pre>
  
  <p>Have I configured the pom correctly ?</p>
  
  <p>The scala tests are running correctly, in that they are all passing. Perhaps this is a Maven bug ?</p>
  
  <p>When I view maven properties for the project the lifecycle mappings are not available : 
  <img src="https://i.stack.imgur.com/4ShEs.png" alt="enter image description here"></p>