Move eUtils WSDL file into resources directory

WSDL directory has been moved into the resources directory. Scalaxb
configuration has been changed also to locate the ".wsdl" and ".xsd" into the
"src/main/resources/wsdl" and "src/main/resources/xsd" directories
respectively.

Also changed generated package name for scalaxb code from "soap" to
"scalaxb.generated".