Fix OSGI error in product-mb

ConfigurationException class was not exported in the OSGI enviroment.
Therefore the Andes Component was not satisfied. This fix move the
ConfigurationException into a exported package.

There was also a configuration loading error in the logic. This also
provide a fix for that.
Merge pull request #57 from a5anka/fix_osgi_error

Fix OSGI error in product-mb