Fix missing comma detected by python json

Change-Id: I96c09669c04fbd783fbde9d1d8be0c808d6426bc
uniformly adding a new line to the end of the json files.

Change-Id: I1eb1a791c1a1ebc5bccfe3865b5b1ec6690d7e99
Merge topic 'SIMPLEITK-373_BeautifyJSON' into next

cda49c5 uniformly adding a new line to the end of the json files.
995d459 Fix missing comma detected by python json