Update observation yamls for atmosphere var and local ensemble DA

[RussTreadon-NOAA]

This PR updates observation templates use by the variational and local ensemble atmosphere applications. The following changes are included in this PR

• updating radiance bias correction keywords
• renaming templates to match bufr2ioda converter names
• adding observation templates for lgetkf

Resolves #20

[RussTreadon-NOAA]

@emilyhcliu , the changes in this PR are ready for review. Who among our UFO validation staff do you recommend as reviewers?

@CoryMartin-NOAA , I think the automated testing failed because it is looking for feature/bufr2ioda in the NOAA-EMC/jcb-gdas repo. This branch does not exist in NOAA-EMC/jcb-gdas. Branch feature/bufr2ioda is in my jcb-gdas fork. Can/should we generalize automated testing to clone the PR branch from the appropriate repo?

[CoryMartin-NOAA]

@RussTreadon-NOAA I'm not sure if it's easy to use the forks for the automated testing. Dan set this up so I'm not sure how it works, but we can look into it

[RussTreadon-NOAA]

@RussTreadon-NOAA I'm not sure if it's easy to use the forks for the automated testing. Dan set this up so I'm not sure how it works, but we can look into it

Thank you @CoryMartin-NOAA . If we want to explore this possibility, it can be done via a different issue & PR

[CoryMartin-NOAA]

if the test failure causes a problem with merging we can always force-merge, we have the power (but we must use that power judiciously)

[RussTreadon-NOAA]

Thank you @ADCollard and @CoryMartin-NOAA