Adding a check if commit message already starts with the issue key

[sambenskin]

Adding a check if commit message already starts with the issue key

[atlassian-cla-bot]

Thank you for your submission! Like many open source projects, we ask that you sign our CLA (Contributor License Agreement) before we can accept your contribution.
If your email is listed below, please ensure that you sign the CLA with the same email address.

The following users still need to sign our CLA:
❌sambenskin

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[sambenskin]

I tried to fill in the CLA but got a 500 error so I've emailed atlassian to investigate.

[bwieger-atlassian-com]

@sambenskin Let me know what they say.