adding connector for scala (ScalaIDE, scala-maven-plugin)

I can't test the integration  : 

    ➜  m2e-discovery-catalog git:(master) ✗ mvn clean package
    [INFO] Scanning for projects...
    [WARNING] The POM for org.sonatype.plugins:maven-tinkerbell-plugin:jar:0.0.1-SNAPSHOT is missing, no dependency information available
    [ERROR] The build could not read 1 project -> [Help 1]
    [ERROR]   
    [ERROR]   The project org.eclipse.m2e:org.eclipse.m2e.discovery.oss:1.0.0-SNAPSHOT (/home/dwayne/work/oss/m2e-discovery-catalog/org.eclipse.m2e.discovery.oss/pom.xml) has 2 errors
    [ERROR]     Unresolveable build extension: Plugin org.sonatype.plugins:maven-tinkerbell-plugin:0.0.1-SNAPSHOT or one of its dependencies could not be resolved: Failure to find org.sonatype.plugins:maven-tinkerbell-plugin:jar:0.0.1-SNAPSHOT in http://repository.tesla.io:8081/nexus/content/repositories/snapshots/ was cached in the local repository, resolution will not be reattempted until the update interval of tesla-snapshots has elapsed or updates are forced -> [Help 2]
    [ERROR]     Unknown packaging: null @ line 12, column 14
    [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/ProjectBuildingException
    [ERROR] [Help 2] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException

Thanks