MYNEWT-851 newt - Repo pw shown in `git remote -v`
MYNEWT-851 newt - Repo pw shown in `git remote -v`

-Prior to commit-

For private repos, the user's login and password are part of the repo
URL. E.g.,

    wes@~/dev/work/repos/private-repo$ git remote -v
    origin    https://wes3:[password-redacted]@github.com/PrivateRepo/private-repo.git (fetch)
    origin    https://wes3:[password-redacted]@github.com/PrivateRepo/private-repo.git (push)

-After commit-

Newt wraps all git commands that require remote access as follows:

1. Replace remote URL with the authentication-decorated version.
2. Perform git operation.
3. Replace remote URL with unauthenticated version.

apache/incubator-mynewt-newt,apache/incubator-mynewt-newt