811 - Move Mime.properties file.

Remove warnings due to missing MIME map file during maven build.

See issue https://issues.jboss.org/browse/RESTEASY-811

*Before:*
KEEPALIVE!: true
[Tue Jul 22 12:49:23 UTC 2014] MIME map can't be loaded:java.lang.NullPointerException
[Tue Jul 22 12:49:23 UTC 2014] Servlet for path '/' already defined and no default will be used.
[Tue Jul 22 12:49:23 UTC 2014] TJWS httpd localhost - SimpleAcceptor ServerSocket[addr=localhost/127.0.0.1,localport=8081] is listening.

*Now:*
KEEPALIVE!: true
[Tue Jul 22 17:19:35 CEST 2014] Servlet for path '/' already defined and no default will be used.
[Tue Jul 22 17:19:35 CEST 2014] TJWS httpd localhost - SimpleAcceptor ServerSocket[addr=localhost/127.0.0.1,localport=8081] is listening.

- Move mime.properties to resource folder.
- Fix error handeling in initMime()