TL-19850 Finished log error logic around floors functionality

[patrickloughrey]

• Added try catch functionality around price floors logic
• Added corresponding test to make sure other currencies other than USD would be false

[nllerandi3lift]

@patrickloughrey The title is a little misleading from what's being tested.

We hardcode currency and size into how getFloor gets called.

So we'll never call getFloor (which is what calledWith is testing) with EUR or CAD. We could add that check though and add it under the existing 'should call getFloor with the correct parameters based on mediaType' test.

[nllerandi3lift]

Consider a test like this instead:

it('should catch error if getFloor throws error', function() {
      let logErrorSpy = sinon.spy(utils, 'logError');

      bidRequests[0].getFloor = () => {
        throw new Error('An exception!');
      };

      tripleliftAdapterSpec.buildRequests(bidRequests, bidderRequest);

      expect(logErrorSpy.calledOnce).to.equal(true); <-- I've tested up to here and it works
      expect(logErrorSpy.message).to.eql('Triplelift: getFloor threw an error:') <--- This I've not tested but would be a nice to have
    });

[patrickloughrey]

Looking back at this PR - good catch. I changed the tests to what you suggested. Currently unable to get the second expect statement to occur but working through that.

[nllerandi3lift]

@patrickloughrey I've merged into our forked master. Feel free to PR into the main repo