Rename StandardError to Exception.

This is necessary for Python 3 compatibility.

Done using:

  $ py=$( (g grep -l -E '^#!.*python';find -name '*.py' -printf '%P\n';) | \
    sort -u | grep -v README.sh4)
  $ futurize -w -f lib2to3.fixes.fix_standarderror $py

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 scripts/qmp/qemu-ga-client | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/qmp/qemu-ga-client b/scripts/qmp/qemu-ga-client
index 6045fcd3f2..976e69e05f 100755
--- a/scripts/qmp/qemu-ga-client
+++ b/scripts/qmp/qemu-ga-client
@@ -137,7 +137,7 @@ class QemuGuestAgentClient:
 
     def fsfreeze(self, cmd):
         if cmd not in ['status', 'freeze', 'thaw']:
-            raise StandardError('Invalid command: ' + cmd)
+            raise Exception('Invalid command: ' + cmd)
 
         return getattr(self.qga, 'fsfreeze' + '_' + cmd)()
 
@@ -146,7 +146,7 @@ class QemuGuestAgentClient:
 
     def suspend(self, mode):
         if mode not in ['disk', 'ram', 'hybrid']:
-            raise StandardError('Invalid mode: ' + mode)
+            raise Exception('Invalid mode: ' + mode)
 
         try:
             getattr(self.qga, 'suspend' + '_' + mode)()
@@ -157,7 +157,7 @@ class QemuGuestAgentClient:
 
     def shutdown(self, mode='powerdown'):
         if mode not in ['powerdown', 'halt', 'reboot']:
-            raise StandardError('Invalid mode: ' + mode)
+            raise Exception('Invalid mode: ' + mode)
 
         try:
             self.qga.shutdown(mode=mode)
-- 
2.18.0.rc1.1.g3f1ff2140