Scripts that build Codenvy CLI and other images fail on Ubuntu 16.04

[garagatyi]

When I try to build Codenvy CLI image on my system I get errors like this:

✔  16:52 ~/workspace/codenvy/dockerfiles/cli [ master ↓·1↑·17 | ⚑ 3 ] $ ./build.sh
./build.sh: 16: ./build.sh: [[: not found
Building Docker Image codenvy/cli from /home/gaal/workspace/codenvy/dockerfiles/cli directory with tag 
invalid argument "codenvy/cli:" for t: Error parsing reference: "codenvy/cli:" is not a valid repository/tag
See 'docker build --help'.
Failure when building docker image codenvy/cli:

✔  16:52 ~/workspace/codenvy/dockerfiles/cli [ master ↓·1↑·17 | ⚑ 3 ] $ 

Looks like it uses default shell (which is dash in my case I suppose) but syntax if [[ ]]; then is unsupported.

Codenvy version: 5.0.0-Snapshot
OS and version: Ubuntu 16.04

Other questions:
Problem can be reliably reproduced: [Yes]

[benoitf]

Fix provided by PR #1494