[UAT-35] Impossible to create a new Object (Study, Assay...) in Browse

This bug seems related with Grails 2.3 bug http://jira.grails.org/browse/GRAILS-10890
When url contains no-cache parameter (e.g. _=1388399354366) initializing domain object with params (e.g. new FmFolder(params)) gives "String index out of range: 2" error message.
For this particular case it's fixed by replacing GET request with proper POST one for saving