juju env could be friendlier to scripts

[Stuart Bishop]

The 'juju env' and 'juju switch' commands output annotated, human readable text:

    Current environment: "fooenv"

I suspect it would be just as readable and more friendly to scripting if just the raw environment name was emitted.

[Frank Mueller (themue)]

Two different solutions:

1. simply always print 'fooenv' instead of 'Current environment: "fooenv"' or

2. add an argument (e.g. -r / --raw) so that the output stay as it is but with the argument the raw env name is printed.

I would prefer the second solution. So it stays user oriented an consistent with the -l / --list option for the listing of environment.

[Frank Mueller (themue)]

Agreed on -r / --raw with frankban on IRC.

[Frank Mueller (themue)]

After discussion in the proposal and agreement with frankban changing it to be raw by default.