.InstallRepos does not return exactly one repo with the installSource bit set

[mclamb]

The docs (https://provision.readthedocs.io/en/latest/doc/arch/data.html#template) state that:

.InstallRepos - Returns exactly one Repo from the list chosen by MachineRepos that has the installSource bit set, and at most one Repo from the MachineRepos that has the securitySource bit set.

.MachineRepos is determined by .Repos which itself is determine by the package-repositories param.

.InstallRepos does not honor any installSource bits set in package-repositories. It does pick at most one repo with securitySource bit set.