OO-386: modifications for postgres (I would prefer inner join for all security groups and resources)

OO-372,OO-96: make the xml config a text/clob field as the configuration of the mapper can be pretty long

OO-386: remove the async executor of the repository manager and replace it with a evict from cache, select for update, merge process

no-jira: make a test in GroupMgmtTest reliable, fix some tests for Oracle, fix invisible NPE in Portal

OO-296: fixed wrong alias in checkUploadFileArtefactWithinBinder() and fixed missing selector in artefactExists().

no-jira: fix documentation of REST API, fix wrong path of the LogWebService, backport RegistrationWebService to OpenOLAT with its unit tests

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

OO-266: fix double redirect on the same request/output stream of tomcat if login in blocked with Shibboleth

OO-379: hold always the selected entry in the search with the table model hold by the table controller

OO-354: include first step to support oracle, openolat can be started, administrator can log in, update script from 8.1 to 8.2... (EXPERIMENTAL)

OO-272 OO-371 svg loader with alpha transparency (thanks stephan clemenz), use modernizr to detect browser features to better support IE7/8

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