Added some AIA tests. 1. Marked createHMI as online because of hv.download_jp2(). 2. Created AIA tests in a similar vein to HMI. 3. AIA object is available in sunpy module as AIA_171_IMAGE, so used it.
Added some AIA tests.
1. Marked createHMI as online because of hv.download_jp2().
2. Created AIA tests in a similar vein to HMI.
3. AIA object is available in sunpy module as AIA_171_IMAGE, so used it.

Alex-Ian-Hamilton/sunpy,dpshelio/sunpy,Alex-Ian-Hamilton/sunpy,dpshelio/sunpy,dpshelio/sunpy,Alex-Ian-Hamilton/sunpy