bootstrap.sh should fail fast if go is not installed

[rushiagr]

Even if go is not installed (or is not on the $PATH, which is more likelier), the script goes on and executes completely. Two solutions: 1. Check if go is present, and fail if not. 2. Pass -e flag to the bash script (set -e), which will make the script fail as soon as first error is encountered (but we might not want this)

[enisoc]

We should probably run with 'set -e' but we'd need to clean up bootstrap.sh and dev.env first. I think there are places where we're ok with things failing, so we'd need to fix those so they don't derail everything.

[rushiagr]

Yes, that's the problem with using 'set -e'. I have submitted a pull request #361 which fails if go is not present