Do not double slash when context path is root

[jcgay]

At least with Tomcat (not reproduced with Jetty), ServletContext#getContextPath
returns '/'. When Jersey servlet is mapped on '/something', we ends by creating links
starting with '//something' which is wrong...

[nicokosi]

Cool. 😎

I have a build issue which is not related to this change (I cannot build branch master either):

[INFO] Reactor Summary:
[INFO]
[INFO] JAX-RS Linker: parent POM .......................... SUCCESS [ 1.209 s]
[INFO] JAX RS Linker ...................................... SUCCESS [ 11.511 s]
[INFO] JAX RS Linker: integration test suite .............. SUCCESS [ 0.007 s]
[INFO] JAX RS Linker: webapp without any XML configuration FAILURE [ 2.305 s]
[INFO] JAX RS Linker: webapp with web.xml ................. SKIPPED
[INFO] JAX-RS Linker: webapp without JAX-RS Configuration . SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 15.293 s
[INFO] Finished at: 2015-08-24T08:55:26+02:00
[INFO] Final Memory: 34M/818M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.eclipse.jetty:jetty-maven-plugin:9.3.0.M1:run-forked (start-server) on project no-xml-webapp: Unable to parse configuration of mojo org.eclipse.jetty:jetty-maven-plugin:9.3.0.M1:run-forked for parameter webApp: Cannot create instance of class org.eclipse.jetty.maven.plugin.JettyWebAppContext: org/slf4j/helpers/MessageFormatter: org.slf4j.helpers.MessageFormatter -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginConfigurationException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR] mvn -rf :no-xml-webapp

Is this a configuration issue on my machine? 🎱

[nicokosi]

I merge (Travis build is OK):
https://travis-ci.org/softwarevidal/jax-rs-linker/jobs/76660101

[nicokosi]

For information, I had a local build issue related to a Maven extension, maven-color (https://github.com/jcgay/maven-color). I applied a patch (http://jeanchristophegay.com/binaries/maven-core-3.3.3.jar, thanks @jcgay) that fixed it. 🌈