remove wildcards from make spack core and packages

- This removes all wildcard imports EXCEPT `from spack import *` in packages

var/spack/repos/builtin/packages/openblas/package.py

@@ -22,11 +22,12 @@
 # License along with this program; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ##############################################################################
-from spack import *
-from spack.package_test import *
-import spack.architecture
 import os
 
+from spack import *
+from spack.package_test import compare_output_file, compile_c_and_execute
+import spack.architecture
+
 
 class Openblas(MakefilePackage):
     """OpenBLAS: An optimized BLAS library"""