title: Maven build error on upgrading to new Spring Boot version
body: <p>I have a Maven Spring Boot project running within STS which builds fine:</p>
  
  <pre><code>   &lt;parent&gt;
          &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
          &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
          &lt;version&gt;1.2.5.RELEASE&lt;/version&gt;
          &lt;relativePath /&gt; &lt;!-- lookup parent from repository --&gt;
      &lt;/parent&gt;
  </code></pre>
  
  <p>Updating the Spring Boot's version in the above to <strong>1.3.0.M4</strong> results in: </p>
  
  <pre><code>[FATAL] Non-resolvable parent POM: Could not transfer artifact org.springframework.boot:spring-boot-starter-parent:pom:1.3.0.M4 from/to IWS_Repo (https://build-devtools.fw.net/artifactory/repo/): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target and 'parent.relativePath' points at no local POM @ line 18, column 10
  </code></pre>
  
  <p>I tried it both in STS and on the command line: same error.  </p>
  
  <p>What could be the problem?</p>