snappy update downloads non-namespaced package when fork is installed

[Jamie Strandboge]

I had hello-world.jdstrand installed:
$ sudo snappy install hello-world.jdstrand
Installing hello-world.jdstrand
Starting download of hello-world.jdstrand
31.66 KB / 31.66 KB [==========================================] 100.00 % 64.70 KB/s
Done
Name Date Version Developer
ubuntu-core 2015-04-29 47 ubuntu
hello-world 2015-04-29 1.5 jdstrand
generic-amd64 2015-04-27 1.1

I then uploaded hello-world 1.5.1 to the store and then ran snappy update:
$ sudo snappy update
Installing hello-world (1.0.14)
Starting download of hello-world
32.73 KB / 32.73 KB [=========================================] 100.00 % 124.32 KB/s
Done
a package by that name is already installed
(amd64)ubuntu@localhost:~$ snappy list
Name Date Version Developer
ubuntu-core 2015-04-29 47 ubuntu
hello-world 2015-04-29 1.5 jdstrand
generic-amd64 2015-04-27 1.1

hello-world 1.0.14 is hello-world.canonical, but as you can see, I had hello-world.jdstrand installed.

This also downloads the wrong package:
$ sudo snappy update hello-world.jdstrand

And this fails too:
$ sudo snappy install hello-world.jdstrand
Installing hello-world.jdstrand
hello-world.jdstrand failed to install: a package by that name is already installed

Currently the only way to upgrade a fork is to remove then install.