pylint: Fix some deprecation warnings and minor bits

Signed-off-by: Cole Robinson <crobinso@redhat.com>

virtManager/createvm.py

@@ -1776,7 +1776,7 @@ class vmmCreateVM(vmmGObjectUI):
         detectThread = threading.Thread(target=self._detect_thread_cb,
                                         name="Actual media detection",
                                         args=(cdrom, location, thread_results))
-        detectThread.setDaemon(True)
+        detectThread.daemon = True
         detectThread.start()
 
         self._os_list.search_entry.set_text(_("Detecting..."))

virtManager/object/domain.py

@@ -28,7 +28,7 @@ class _SENTINEL(object):
 
 
 def start_job_progress_thread(vm, meter, progtext):
-    current_thread = threading.currentThread()
+    current_thread = threading.current_thread()
 
     def jobinfo_cb():
         while True:

virtinst/osdict.py

@@ -606,7 +606,7 @@ class _OsVariant(object):
         if self.distro not in ["centos", "rhel", "fedora"]:
             return None
 
-        # Default for RH distros, incase libosinfo data isn't complete
+        # Default for RH distros, in case libosinfo data isn't complete
         return "inst.repo"  # pragma: no cover
 
     def _get_generic_location(self, treelist, arch, profile):

virtinst/storage.py

@@ -680,7 +680,7 @@ class StorageVolume(_StorageObject):
         t = threading.Thread(target=_progress_thread,
                              name="Checking storage allocation",
                              args=(self.name, self.pool, meter, event))
-        t.setDaemon(True)
+        t.daemon = True
 
         try:
             t.start()