REQS-525 Replace Tenor with Maturity in CDS Securities

Note, this is a breaking change but due to the limited use of this class it was decided to go ahead.
REQS-525 Deprecate old cds securities
[PLAT-6851] fix up more definitions
[PLAT-6851] Fix up commodity defns
[PLAT-6851] patch up equity future defns
[PLAT-6851] fix up equity variance swaps
[PLAT-6851] Remove test of deprecated code.
[PLAT-6851] Remove test of deprecated code.
[PLAT-6851] removing more deprecated from commodities
[PLAT-6851] Clean up forex instrument
[PLAT-6851] fix up bonds
[PLAT-6851] Patch up OG-Web
[PLAT-6851] Remove bond item containing deprecated
Merge pull request #265 from OpenGamma/REQS-666/PLAT-6851-4

REQS-666/PLAT-6851 Stage 4
[PLAT-6851] Remove deprecated functionality and testing in ON Coupons.
[PLAT-6851] removing dead tests
[PLAT-6851] patch up AnnuityCoupon
[PLAT-6851] Remove deprecated AnnuityCouponIborRatchetLMMMethodTest
[PLAT-6851] remove deprecated tests
[PLAT-6851] rm CapFloorHullWhiteCalibrationObjectiveTest