remove property name collision on js strings

fixes CNVS-14258, CNVS-14237, CNVS-13700

Change-Id: I6d298c2729c302ad1aac245a9a0cdde5d3835e98
Reviewed-on: https://gerrit.instructure.com/37776
Reviewed-by: Jason Madsen <jmadsen@instructure.com>
Reviewed-by: Liz Abinante <labinante@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
QA-Review: Caleb Guanzon <cguanzon@instructure.com>
Product-Review: Ryan Florence <ryanf@instructure.com>