[ERROR]?Plugin?org.apache.maven.plugins:maven-clean-plugin:2.5?or?one?of?its?dependencies?could?not?be?resolved:?Failed?to?read?artifact?descriptor?for?org.apache.maven.plugins:maven-clean-plugin:jar:2.5:?Could?not?transfer?artifact?org.apache.maven.plugins:maven-clean-plugin:pom:2.5?from/to?central?(http://repo.maven.apache.org/maven2):?Failed?to?transfer?file:?http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-clean-plugin/2.5/maven-clean-plugin-2.5.pom.?Return?code?is:?501?,?ReasonPhrase:HTTPS?Required.?->?[Help?1]