Added build script for gitlab.

2 jobs for master in 36 seconds
Status Job ID Name Coverage
  Build
failed #2114
java
job_build

00:00:36

 
  Deploy
skipped #2115
java
job_deploy
 
Name Stage Failure
failed
job_build Build There is an unknown failure, please try again
[ERROR] Please refer to /home/gitlab-runner/builds/12e532f1/0/james.coyle/postcodes-io-java/target/surefire-reports for the individual test results.
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
ERROR: Job failed: exit status 1