Update Clover license warning message

Problem Definition

In Bamboo, we see the following message when enabling Clover for a build:

Global Clover license has not been configured. You need to provide license in order to use Clover

Suggested Solution

Either:

• Improve the note to add a mention of integrating Clover into the Build; or
• Remove the license requirement

Why this is important

As Clover is now Open Source, users will be unable to provide licenses, as no new licenses are available

Workaround

Please integrate Clover into your pom.xml or build.xml and then select "Clover is already integrated into this build and a clover.xml file will be produced" when enabling Clover for your Build plan.
Please see the following Community answer for more detail:

• Clover is open source yet license required for bamboo