RepositoryRegistry is used for indexing context now. There is still more work to do
to move the maven dependent parts into its own projects and update the dependencies.

Adding content provider service that creates repository content instances
remove direct access to the repository content instances.

Using the repository api where necessary.

- Prevent redundant removals for same artifacts
- Adding metadata removal for each file removal
- Adding mock verifications for metadata removal in unit tests

As suggested in the SLF4J FAQ:
https://www.slf4j.org/faq.html#logging_performance
.. parameterized logging can improve the efficiency of logger calls when
logging at the specified level is disabled.

In addition, per the FAQ: https://www.slf4j.org/faq.html#paramException
since SLF4J 1.6.0 it is possible to use parameterized logging and also
log an exception/throwable.

toString() is called automatically:
https://www.slf4j.org/faq.html#string_contents

These changes were suggested by SLF4J Helper for NetBeans IDE:
http://plugins.netbeans.org/plugin/72557/

Signed-off-by: olivier lamy <olamy@apache.org>

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1541400 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1541399 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1385188 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1385187 13f79535-47bb-0310-9956-ffa450edef68

remove testcase; reorder import;
repositorypurgeconsommerTest fixed for: 
  Unable to add new repository with id [test-repo], that id already exists as a managed repository.

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1379835 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1370597 13f79535-47bb-0310-9956-ffa450edef68

git-svn-id: https://svn.apache.org/repos/asf/archiva/trunk@1370577 13f79535-47bb-0310-9956-ffa450edef68