Adding new API module (metadata-statistics-api) for statistics and move the
jcr specific tasks to the metadata store module.

Providing interfaces for the statistics API.

Removing dependencies to store specific libraries (like JCR) from the statistic
modules.

Adds additional rest method to list the repositories where the user
has manage permissions.
Restricts the view for uploads to only managable repositories.

Added REST methods:

artifactsByProjectVersionMetadata/{key}/{value}
artifactsByMetadata/{key}/{value}
artifactsByProperty/{key}/{value}
searchArtifacts/{text}
searchArtifacts/{key}/{text}

In JCR implementation When searching into any property (key = nil) we can't do exact searchs

this avoids modules wanting to report a problem from having to depend on the
plugin itself and its consumer, etc.

start download api currently redirect

(fix html content + replace @todo with TODO  )

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git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1558609 13f79535-47bb-0310-9956-ffa450edef68

Add rest api

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make some order hypothesis

git-svn-id: https://svn.apache.org/repos/asf/archiva/branches/archiva-MRM-1756@1480100 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/branches/archiva-MRM-1756@1477395 13f79535-47bb-0310-9956-ffa450edef68

remove a space in transactions name pom.

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1456696 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1447754 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1447480 13f79535-47bb-0310-9956-ffa450edef68