[bin] don't print warning when which/rover is not available

[mikz]

just don't print any error output when trying to detect rover

[mayorova]

Maybe we could replace which rover with type -p rover ? So it can potentially be used on OSs that don't have which

[mikz]

@mayorova type -p outputs rover is ./lua_modules/bin/rover for me. Which can't be used as an executable. On zsh type is whence -v. In apicast image neither of those work: which, whence, type.

[mayorova]

@mikz OK, interesting

For me type -p returns just the filename (without -p it does return X is). And apicast's bash does have type, but yeah, when run at the startup it's not available indeed.

How about command -v rover? :)

It should work find, no? For example, it does find the openresty executable:

docker run quay.io/3scale/apicast:master command -v openresty

[mikz]

@mayorova updated to command -v.

[mayorova]

Looks good :)