Various updates to the NCO package and dependencies (#2639)

* Remove +mpi variant from NCO

* Update NCO deps to AutotoolsPackage

* Update the other NetCDF packages to AutotoolsPackage

* ANTLR has a nolink deptype on java, don't worry about csharp

* Remove restrictions from NCO package, fix homepage

* Add version 4.6.3 of NCO

* Missed AutotoolsPackage for NetCDF-CXX4

* NetCDF tests fail when run in parallel

* Remove commented out dependency

* Add documentation dependency

var/spack/repos/builtin/packages/netcdf-cxx/package.py

@@ -25,7 +25,7 @@
 from spack import *
 
 
-class NetcdfCxx(Package):
+class NetcdfCxx(AutotoolsPackage):
     """Deprecated C++ compatibility bindings for NetCDF.
     These do NOT read or write NetCDF-4 files, and are no longer
     maintained by Unidata.  Developers should migrate to current
@@ -37,8 +37,3 @@ class NetcdfCxx(Package):
     version('4.2', 'd32b20c00f144ae6565d9e98d9f6204c')
 
     depends_on('netcdf')
-
-    def install(self, spec, prefix):
-        configure('--prefix=%s' % prefix)
-        make()
-        make("install")