title: Maven build of Saiku open source project fails second time after no changes
body: <p>I was doing a build yesterday for the second time of an open source project (Saiku) – I have made no changes to the POM.XML or any of the libraries/jars. The build succeeded a few days ago but now fails. The following pastebin shows the output. The errors are of two types – failure to delete /clean project, and cannot find artifact. Does anyone have any troubleshooting tips? </p>
  
  <p><strong><a href="http://pastebin.com/g2bpAtMS" rel="nofollow">http://pastebin.com/g2bpAtMS</a></strong></p>
  
  <p><strong>error type 1</strong></p>
  
  <pre><code>[ERROR] Failed to execute goal org.apache.maven.plugins:maven-clean-plugin:2.4.1:clean (default-clean) on project saiku-core: Failed to clean project: Failed to delete /usr/local/.m2/repository/saiku/saiku-core/target/javadoc-bundle-options/javadoc-options-javadoc-resources.xml
  </code></pre>
  
  <p><strong>error Type 2</strong></p>
  
  <pre><code>  - [ERROR] The build could not read 1 project -&gt; [Help 1]
    - [ERROR]   The project org.saiku:saiku-webapp:2.2-SNAPSHOT (/usr/local/.m2/repository/saiku/saiku-webapp/pom.xml) has 1 error
    - [ERROR]     Non-resolvable parent POM: Could not find artifact org.saiku:saiku-core:pom:2.2-SNAPSHOT and 'parent.relativePath' points at wrong local POM @ line 3, column 10 -&gt; [Help 2]
  </code></pre>