Get Rid of nobuild, nolink, and alldeps (#2765)

* Removing the nobuild, nolink, and alldeps dependency types in favor of being explicit.
* This will help with maintenance going forward, as adding more dependency types won't affect existing declared dependencies in weird ways.
* default deptype is still `('build', 'link')`

var/spack/repos/builtin/packages/r-rpostgresql/package.py

@@ -42,5 +42,5 @@ class RRpostgresql(RPackage):
 
     version('0.4-1', 'e7b22e212afbb2cbb88bab937f93e55a')
 
-    depends_on('r-dbi', type=nolink)
+    depends_on('r-dbi', type=('build', 'run'))
     depends_on('postgresql')