Fixes for handling SML and directory related configuration keys

[anakinj]

While configuring a new instance of the latest (7.1.0) SQL version I noticed that some properties from the configuration files were not taken into account and always needed to be changed via the settings UI.

Looking closer into the issue I noticed a few problems:

• When reading the SML/Directory related configuration values from the DB the fallback will be the hardcoded values, not the ones from the config file
• The application.properties resource shipped within the app had the new keys define that prevented the old keys from being read

This PR fixes these by:

• Fallback to set config values instead of constants when reading settings from DB
• Use the new config keys when reading the SML/Directory related values
• Disable the SML/Directory related values from the default application.properties