Migrate to nova_powervm folder

Python does not support a dash in the package name.  This changeset
migrates the package to 'nova_powervm' to make it work properly.

Change-Id: I590d83a14b8b7ab4acc94b31fc6cbc49a5132ce2

setup.cfg

@@ -20,7 +20,7 @@ classifier =
 
 [files]
 packages =
-    nova-powervm
+    nova_powervm
 
 [build_sphinx]
 source-dir = doc/source
@@ -31,15 +31,15 @@ all_files = 1
 upload-dir = doc/build/html
 
 [compile_catalog]
-directory = nova-powervm/locale
+directory = nova_powervm/locale
 domain = nova-powervm
 
 [update_catalog]
 domain = nova-powervm
-output_dir = nova-powervm/locale
-input_file = nova-powervm/locale/nova-powervm.pot
+output_dir = nova_powervm/locale
+input_file = nova_powervm/locale/nova-powervm.pot
 
 [extract_messages]
 keywords = _ gettext ngettext l_ lazy_gettext
 mapping_file = babel.cfg
-output_file = nova-powervm/locale/nova-powervm.pot
+output_file = nova_powervm/locale/nova-powervm.pot