Migrate endpoint tests to use new common-api testing package

We should make use of the new testing package in one of our simple APIs to ensure there are no issues with it before we start rolling it out to other projects.

added statetodo label

assigned to @zacharysabourin

added statewip label and removed statetodo label

mentioned in commit zacharysabourin/eclipsefdn-working-groups-api@63eb39db

mentioned in merge request !17 (merged)

added stateblock label and removed statewip label

marked this issue as related to eclipsefdn-api-common#14 (closed)

removed the relation with eclipsefdn-api-common#14 (closed)

added statewip label and removed stateblock label

added statereview label and removed statewip label

closed with merge request !17 (merged)

mentioned in commit 823ff952