title: Issue in adding M2_REPO variable in eclipse
body: <p>I am adding M2_REPO variable in eclipse using <code>Window --&gt; Preferences --&gt; Java --&gt; Build Path --&gt; Classpath Variables --&gt; New --&gt;</code> and then providing name as <strong>M2_REPO</strong> and selecting maven repository folder, then I see this variable getting added in the <strong>Classpath variables</strong> list. Then I click OK button.</p>
  
  <p>After that, if again I see the above <strong>Classpath variables</strong>, then i don't find the <strong>M2_REPO</strong> variable there, due to which I am getting <code>Unbound classpath variable: M2_REPO/....jar</code> error in my project.</p>
  
  <p>Can someone please help.</p>