Make 4.6.0 branch use Maven for Travis (for now).
Make 4.6.0 branch use Maven for Travis (for now).

Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java,Unidata/netcdf-java