Two plugin classes implemented in OpenGrok - groups and projects restrictions

[tulinkry]

This expects the #1525 to be merged as it already implements the new interface.

This change provides two simple plugins to statically enforce some authorization for groups or projects.

• GroupPlugin.java
• ProjectPlugin.java

Both performing authorization for groups (or projects) based on statically initialized set of groups (projects) which are allowed. The initialization can be one of

• a single string instance
• a string array (the example bellow)
• a list of strings

Example:
(note the <string>1</string> is real group name in my setup)

<object class="org.opensolaris.opengrok.authorization.AuthorizationPlugin"> <void property="name"> <string>org.opensolaris.opengrok.authorization.plugins.GroupPlugin</string> </void> <void property="role"> <string>SUFFICIENT</string> </void> <void property="setup"> <void method="put"> <string>groups</string> <array class="java.lang.String" length="2"> <void index="0"> <string>1</string> </void> <void index="1"> <string>2</string> </void> </array> </void> </void> </object

There are also the changes for #1525 which I'll merge manually after the PR gets merged

[tulinkry]

A good idea could be to use also a blacklist, not only the whitelist

[tulinkry]

With the new addition in #1560 this PR is quite meaningless