Allow the caller to specify a username and password so that private issues

Allow the caller to specify a username and password so that private issues
can be applied.  This is the first part for this bug; the second part is in commands.py where this is called by the TS.

BUG=149941
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=157355

[M-A Ruel, 2012-09-17 23:13:27]

http://codereview.chromium.org/10917306/diff/1/apply_issue.py
File apply_issue.py (right):

http://codereview.chromium.org/10917306/diff/1/apply_issue.py#newcode69
apply_issue.py:69: print('Accessing the issue requires login.')
I'd prefer to keep the fallback.

[Roger Tawa OOO till Jul 10th, 2012-09-18 14:31:35]

Merci MA.  Comments addressed, changes uploaded.  Please take another look.

http://codereview.chromium.org/10917306/diff/1/apply_issue.py
File apply_issue.py (right):

http://codereview.chromium.org/10917306/diff/1/apply_issue.py#newcode69
apply_issue.py:69: print('Accessing the issue requires login.')
On 2012/09/17 23:13:27, Marc-Antoine Ruel wrote:
> I'd prefer to keep the fallback.

Agreed.  I was thinking that ('',None) was the same as (None,None), but its not.
 Done.

[M-A Ruel, 2012-09-18 14:38:12]

lgtm

[commit-bot: I haz the power, 2012-09-18 14:46:50]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/rogerta@chromium.org/10917306/4001

[commit-bot: I haz the power, 2012-09-18 14:49:44]

Change committed as 157355