Lack of Docker can cause build failure
To avoid it if Docker is not available
test is not started, simply returns 0
It is hard to make Docker installation reliable especially for very old or very new distros
The tests can now be run as root. This is most likely required in some
cases and it should not break things if they are run as root (e.g. inside
a VM with no other users).
NPM prevents the use of the root user (due to modules getting root access)
and uses an unprivileged user to install the modules. As maxctrl has to
generate the version information at install time, running `npm install` as
root will fail due to missing privileges to the current working
directory. To work around this, an explicit step was added.
Also changed the maxadmin checks to maxctrl to remove the dependency on
the socket file location being writable by non-root users
(/var/run/maxscale/ might not be accessible to all users).
If a relationship isn't defined, it should not be removed. Only if a
relationship is change to a null relationship, should it be removed.
Also fixed the maxctrl test suite to verify that both it and the REST API
tests pass.
Moved and renamed the starting and stopping scripts from the REST API
tests to a common directory. This way the MaxCtrl tests can use the same
scripts to start and stop MaxScale.
Also moved the test configuration file into the `test/` directory and
changed some of the default directory locations.
The script can now be used to run an arbitrary set of Node.js tests as
long as they define the `test` npm target. Refactored REST API tests to
fit into this framework.
