SOS Wrapper with initial SOS 2.0 support

* New SosWrapperFactor
* Removed google guava dependency
* Initial SOS 2.0 support by Wrapper
* Initial binding support in SOS 2.0 request building
  * POX - done incl. validation
  * SOAP - open
  * KVP - open
* Minor changes driven by sonar output
* New LaxValidationCase including validation of substitution group
* New type of LaxValidationCase -> DependingLaxValidationCase
* New type ows.Constraint for a better identification which URL to use when requesting an SOS