raspberry pi pin importer (draft)

Some issues related to the speed in which java has access to device generate some issues (missing switch slot) to obtain information from a RC circuit (responsible to module analog signal)
raspberry importer: remove test files
Adapt load class in utils to be better handled

Fuchsia loadClass is statical and cannot be mocked, so in order to comport test classes, we try to load from the current bundle context (assuming that the test itself has the class that he wants to load)
Fix service reference handling in declaration

Trigger bind before trigger the exporter itself and use the service id rather than adopt contains() from a Set collection (which usually indicated a false negative result due to object comparison)