Consistent naming for impact report field names

[j0x0j]

Please apply a consistent naming pattern for impact report field names.

• Prefix all fields with ir_
• First letter of name must be in lower case
• The whole name should be in camel notation, except prefix. For ex: ir_lostHarvestAmount

[tushali024]

Fixed: https://github.com/teamraincoat/enrollment-app/pull/64