[snowpatch] [PATCH V2] Initial support for testing from multiple base branches

[Russell Currey]

On Fri, 2016-04-08 at 10:27 +1000, Andrew Donnellan wrote:
> Many large projects have a number of different branches, such as "master",
> "next" and "stable". A submitted patch may be intended to be applied on top
> of any one of these branches, or possibly for multiple branches.
> 
> To allow testing on multiple base branches, rather than specifying a single
> base branch, we now specify a list of base branches in the project
> configuration.
> 
> By default, snowpatch will attempt to apply patches on every base branch
> and trigger a Jenkins job for every branch. By setting "test_all_branches =
> false" in the project configuration, snowpatch will go through the listed
> base branches in order and trigger a Jenkins job on the first branch on
> which the patch is successfully applied.
> 
> This support needs some cleanup and some more work, but this is a start.
> 
> Closes: #2 ("Multiple branch support")
> Signed-off-by: Andrew Donnellan <andrew.donnellan at au1.ibm.com>
Applied to master as 0f4a17de8a19276b7b445356bfcaa2bc88f820ad, thanks.