[pkg-go] dh-make-golang shows already packed packages as unpackaged

[Raju Devidas]

Hello Debian Gophers,
    While packaging micro text editor. I have goconvey as one of its sub dependencies,
    as detected by the current `dh-make-golang` from git. 

    We already filed an ITP for packaging goconvey
     https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890013

    While working on the package, I asked multiple questions on #debian-golang
    Including the part of the package name. 

    I was told that the package would generate two binaries `goconvey` and `golang-github-smartystreets-goconvey`
    And after spending some time to get the package built. 
    I just learned from the tracker that the package is already done and is in repos. 

    https://tracker.debian.org/pkg/golang-github-smartystreets-goconvey
    
    I guess when having the discussion about it on #debian-golang, it occured to no one
    that the package already exists. 

    Also is this a bug with `dh-make-golang` or is it a problem of the naming
    terminologies that we use?