wic: code cleanup: wildcard imports

Here is what PEP8(Style Guide for Python Code) says about this:

Wildcard imports (from <module> import *) should be avoided, as they
make it unclear which names are present in the namespace, confusing
both readers and many automated tools.

(From OE-Core rev: 13416c1941f5dc8abcdb0073f2104a89eae2d6f1)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/utils/fs_related.py

@@ -20,10 +20,7 @@ from __future__ import with_statement
 import os
 import errno
 
-from wic import msger
-from wic.utils import runner
-from wic.utils.errors import *
-from wic.utils.oe.misc import *
+from wic.utils.oe.misc import exec_cmd
 
 def makedirs(dirname):
     """A version of os.makedirs() that doesn't throw an

scripts/lib/wic/utils/partitionedfs.py

@@ -19,10 +19,8 @@
 # Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 from wic import msger
-from wic.utils import runner
 from wic.utils.errors import ImageError
-from wic.utils.fs_related import *
-from wic.utils.oe.misc import *
+from wic.utils.oe.misc import exec_cmd, exec_native_cmd
 
 # Overhead of the MBR partitioning scheme (just one sector)
 MBR_OVERHEAD = 1