Set max-lengths on the things

As of https://github.com/oaeproject/Hilary/commit/4651d2f70cfcfad6c5fe18ca6f2fe832848d0991 the backend now validates incoming parameters for max lengths.

The following parameters get checked:

 * displayName - max 1.000 chars
 * description - max 10.000 chars
 * comment body = max 100.000 chars

Adding this to R1 and assigning to @bp323