Replace .gitlab-ci.yml

Added support for deployment local and remote build and deployment on maxwell. There are four new variables that need to be defined in the project.

MAXWELL_DEPLOYMENT that can have values of either "local" or "remote".
USER_NAME that should be the name of the account on maxwell.
ACCOUNT_PASSWORD clear text password for the account. This is used when Kerberos is used to login to maxwell.
SSH_PRIVATE_KEY (of type file) which will hold the SSH private key of the user. This is used when ssh is used instead of kerberos.

Added build and test on MacOS. Added placeholder for build and test on Windows.