Implement fallback mechanism for AS7 properties in pom.xml

There are several places where is used fallback mechanism when some content from property is taken like:

static final String someIPproperty = System.getProperty("<some> key>", "localhost");

The final decision based on (linked) AS7 devel discussion is leaving this approach and set-up this things in pom.xml's only.

After this task will be done, old approach will be leaved at all and every new patch will be forced to not use/include a such fallback mechanism only.