Fix CI failures (db2)

[b-admike]

Description/Steps to reproduce

Right now, we have test cases (9) failing for CI runs on master. We need to fix them, so that we have master passing and so that new pull requests do not have to ignore / worry about them.

[b-admike]

See https://cis-jenkins.swg-devops.com/job/nb/job/loopback-connector-db2~master/label=x64%20&&%20linux%20&&%20nvm,nodeVersion=8/9/consoleFull#-207526304206f8fc75-e0b9-479e-b471-e8fe633361ff for failures (ran a while back though, so might need to create another test PR or test locally).