Remove duplicate entry from example config

[gcapizzi]

What is this change about?

The example config has a duplicated entry, which can make the behaviour of the suite very confusing if they have different values!

Please check all that apply for this PR:

• introduces a new test --- Are you sure everyone should be running this test?
• changes an existing test
• requires an update to a CATs integration-config

Did you update the README as appropriate for this change?

• YES
• N/A

What is the level of urgency for publishing this change?

• Urgent - unblocks current or future work
• Slightly Less than Urgent

[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/170748525

The labels on this github issue will be updated when the story is started.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Giuseppe Capizzi (667f885)

[davewalter]

Thanks @gcapizzi!