Fix file namer

[cehbrecht]

Pull Request Checklist:

• [ ] This PR addresses an already opened issue (for bug fixes / features)
  • This PR fixes issue #xyz
• [x] Tests for the changes have been added (for bug fixes / features)
• [ ] Documentation has been added / updated (for bug fixes / features)
• [x] HISTORY.rst has been updated (with summary of main changes)
• [x] I have added my relevant user information to AUTHORS.md

What kind of change does this PR introduce?:

Bug fix.

This PR fixes the fallback call of the standard file-namer (fmt argument was missing). It also updates the "no_project" test of the standard file-namer which was catching the wrong Exception (KeyError instead of InvalidProject).

Does this PR introduce a breaking change?:

no

Other information:

[coveralls]

Pull Request Test Coverage Report for Build 7584668559

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 72.359%

---

Totals
Change from base Build 7477408111:	-0.1%
Covered Lines:	1733
Relevant Lines:	2395

---

💛 - Coveralls