* Fix#3941 by rewriting che-ip utility
- Rewrite che-ip with more helper functions
- introduce bats unit tests for each function
- For each “supported OS”, we have an output of “ip a show” command and then run against each of this file the tool to check if it performs as expected
./build.sh : build image + run tests (option to skip tests = —skip-tests)
./run.sh : run image
./test.sh : run the unit tests (no need to build the image first)
Change-Id: Ic92825d2b427139d52db69f0131bee21d16d3c0f
Signed-off-by: Florent BENOIT <fbenoit@codenvy.com>