PLAT-6670 Add fudge builder for ReferenceAmount
Revert "PLAT-6670 Add fudge builder for ReferenceAmount"

This reverts commit 373900b5c5c07a168249478a99a635b8a4334d67.
PLAT-6670 Make ReferenceAmount a joda bean
PLAT-6670 ReferenceAmount review feedback
PLAT-6670 RefernceAmount use HashMap throughout
Merge pull request #134 from OpenGamma/topic/PLAT-6670

PLAT-6670 Add fudge builder for ReferenceAmount