./run_tests.sh --makemessages update English PO files only

Closes-Bug: #1224388

We don't need to update PO files of all languages.
PO files of languages other than English should be update by
importing translations from Transifex.

This commit changes "run_tests.sh --makemessages" only updates
English PO files. This makes a patch updating PO files shorter
and helps reviewers to check it.

Change-Id: I5410a06b0bcb0f42c5a0853f95a3fe2087519d51
modifies error message in adding security rule

Because the information on the type of input data
is outputted in "validate_ip_protocol" method,
I removed the information on the type and
modified error message.

At the same time, I make error messages translatables
in this file.

Closes-Bug: #1224210
Change-Id: I697d38ce7da8ff403a391747264eb59db30dd545
Redirecting user back to previous screen

After browser session timeout, the user is now redirected back to the previous
screen upon login.
Also added a non regression unittest.

Change-Id: I995bc217803805364967688e9b896b9b54583b36
Closes-Bug: #1201619
Merge "modifies error message in adding security rule"
Merge "./run_tests.sh --makemessages update English PO files only"
Merge "Redirecting user back to previous screen"
Transifex ja snapshot 2013/09/13 15:55
Merge remote-tracking branch 'origin/master' into trans-ja-havana