cfme_data.data fixture usage becomes just cfme_data

This was a gredsed[0] after removing the .data from the cfme_data fixture
return. I spot-checked that the new calling format works and made sure
none of the altered py files have SyntaxErrors, but didn't thoroughly test
it otherwise.

Sadly, sed didn't lint anything for me, either. :(

[0]: `grep -r -l cfme_data\.data | xargs -n 1 sed -i 's/cfme_data\.data/cfme_data/g'`