OO-296, non-jira: fixed extended version of FunctionalArtefactTest and various fixes related to accelerated test cases.

non-jira: fixed some utility methods using unsafe waitForPageToLoad method and added FunctionalCourseUtil field to FunctionalRepositorySiteUtil.

non-jira, OO-348: Updated tests to use instantiated site utility classes from FunctionalUtil. Fixed unsafe method clickRadio in FunctionalUtil.java.  Implementing checkCreateSubcategory test therefore I have written createCatalogSelector and createCatalogSubcategory method.

OO296: implemented methods to add text or upload file artefact and create learning journal. Additional utility methods had implemented as well.

renamed FunctionalResourcesSite to FunctionalRepositorySiteUtil and therein renamed some fields and methods, too.
Began to implement FunctionalArtefactTest.
Some Bugfixes.

The work on FunctionalResumeTest hasn't finished, yet.

created FunctionalResumeTest class and some utility methods