Hide stacktrace for non-existing properties

Still the path for the non-existing property will be logged. No reason
to include the stacktrace
Make in- and excludes a bit bigger
close #89 : Need basic LDAP authentication
basic support is implemented. The configuration file is located in
@configuration/jaas.config@
That file also lists all currently available configuration properties
Add anonymous role to newly created users, so that they can at least see
the same things a non-logged in user can see
Password field is not required in LDAP use case.
osgi.configuration.area is an URI

change jaas config access code to cope with an URI
fixed ReadOnlyException when an LDAP user logged in for the first time
ref #90 : Project specific rights 
backend-wise the feature is implemented.
Components can participate by implementing @RestrictedComponent@ and
returning the permission string that is required to access the component
AbstractEMFModel now also works without explicit detach()
added securtity base url as a constant
added lifecycle management to BasePanel
rights of anonymous were not properly computed
commit was never called on config sections
new constant for anonymous user
ConfigSectionContributor didn't properly receive the domain model
close #90 : Project specific rights
close #91 : filter out config tabs
close #92 : Database Migration
organized imports
include flyway and flyway fragment into the distribution