title: sun.security.validator.ValidatorException dependency failing
body: <p>I get the following Exception when i use the Primefaces Maven Repository</p>
  
  <p>mvn clean spring-boot:run</p>
  
  <pre><code>[ERROR] Failed to execute goal on project Passwortmanager: Could not resolve dependencies for project org.dominik:Passwortmanager:jar:2.0.3: Failed to collect dependencies at org.primefaces.themes:all-themes:jar:1.0.10: Failed to read artifact descriptor for org.primefaces.themes:all-themes:jar:1.0.10: Could not transfer artifact org.primefaces.themes:all-themes:pom:1.0.10 from/to prime-repo (https://repository.primefaces.org): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -&gt; [Help 1]
  </code></pre>
  
  <p>My POM.xml</p>
  
  <pre><code>    &lt;project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
               xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"&gt;
          &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
          &lt;groupId&gt;org.dominik&lt;/groupId&gt;
          &lt;artifactId&gt;Passwortmanager&lt;/artifactId&gt;
          &lt;packaging&gt;jar&lt;/packaging&gt;
          &lt;version&gt;2.0.3&lt;/version&gt;
  
  
          &lt;repositories&gt;
  
              &lt;repository&gt;
                  &lt;id&gt;prime-repo&lt;/id&gt;
                  &lt;name&gt;PrimeFaces Maven Repository&lt;/name&gt;
                  &lt;url&gt;https://repository.primefaces.org&lt;/url&gt;
                  &lt;layout&gt;default&lt;/layout&gt;
              &lt;/repository&gt;
              &lt;repository&gt;
                  &lt;id&gt;spring-snapshots&lt;/id&gt;
                  &lt;name&gt;Spring Snapshots&lt;/name&gt;
                  &lt;url&gt;https://repo.spring.io/libs-snapshot&lt;/url&gt;
                  &lt;snapshots&gt;
                      &lt;enabled&gt;true&lt;/enabled&gt;
                  &lt;/snapshots&gt;
              &lt;/repository&gt;
          &lt;/repositories&gt;
       &lt;dependencies&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.primefaces.themes&lt;/groupId&gt;
              &lt;artifactId&gt;all-themes&lt;/artifactId&gt;
              &lt;version&gt;${primefaces.theme.version}&lt;/version&gt;
          &lt;/dependency&gt;
      &lt;/dependencies&gt;
   &lt;finalName&gt;Passwortmanager&lt;/finalName&gt;
          &lt;plugins&gt;
              &lt;plugin&gt;
                  &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                  &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
              &lt;/plugin&gt;
              &lt;plugin&gt;
                  &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
                  &lt;artifactId&gt;maven-jar-plugin&lt;/artifactId&gt;
              &lt;/plugin&gt;
          &lt;/plugins&gt;
      &lt;/build&gt;
  &lt;/project&gt;
  </code></pre>
  
  <p>The official Primefaces Showcase doesn't work too: <a href="https://github.com/primefaces/showcase" rel="nofollow noreferrer">https://github.com/primefaces/showcase</a></p>