[PLAT-5813] Starting to refactor spread curves; splitting definition into curve + curve and curve + constant
[PLAT-6095] Adding equity TRS security and TRS base class
[PLAT-6095] Adding equity TRS to financial security visitor
[PLAT-6096] Adding a bond TRS security
[PLAT-6097] Adding support for bond TRS to financial security visitor
[PLAT-6096] Regenerating joda beans