[CDE-311] MimeType resolver does not handle .svg files, thus sending an unknown Content-type in the response header
	- [cpf-pentaho5] new MimeTypeHandler calls platform's org.pentaho.platform.util.web.MimeHelper, defaulting to cpf-core's pt.webdetails.cpf.utils.MimeTypes (if first one is not able to resolve)
	- added unit tests
	- added missing log4j.xml to /test-src (fixes unit test logging)
Merge pull request #40 from pedrofvteixeira/CDE-311

[CDE-311] MimeType resolver does not handle .svg files, thus sending an ...
[CDE-306]: Added default time out for interplugin httpsession to minimize the issue
Merge pull request #41 from pamval/master

[CDE-306]: Added default time out for interplugin httpsession to minimiz...
[CDE-322] - Removed rule that required admin rights to access any file that is located at /system
Merge pull request #42 from graimundo/master

[CDE-322] - Removed rule that required admin rights to access any file that is located at /system
[CDE-322] - Improved security check for access to files inside of system. Now only files that are within a Sparkl plugin directory are accessible without admin rights.
[CDE-322] - getSparklPluginIds now caches the results obtained on its first execution.
Merge pull request #43 from graimundo/master

[CDE-322] - Now only files that are within a Sparkl plugin directory are accessible without admin rights.
[CDA-93]: Fixing reading kettle transformations from repository when on EE
Merge pull request #44 from pamval/master

[CDA-93]: Fixing reading kettle transformations from repository when on ...
[CDE-322] - Whitelisting two other plugins