If there are tags in the test name that describe qualities of the
test that make it ineligible for conformance, raise an error. This
is basically the "skip list" that heptio's e2e image used to use.
Thankfully all of our existing Conformance tests lack these tags. I
considered added [Slow] to the list, but let's save that for another
day.
To detect whether conformance tests have been changed, the test
argument with the `ConformanceIt` is recorded to conformance.txt.
This change remove additional tags (e.g., [Feature:]) and trim spaces,
so that the detection is less-prone to noise.
This change also updates conformance.txt with normalized names.
