PLAT-6692 Added missing coupon types to CouponTenorVisitor

Conflicts:
	projects/OG-Analytics/src/main/java/com/opengamma/analytics/financial/interestrate/CouponTenorVisitor.java
PLAT-6692 Removed redundant CouponPaymentDateVisitor

Conflicts:
	projects/OG-Analytics/src/main/java/com/opengamma/analytics/financial/interestrate/CouponPaymentDateVisitor.java
PLAT-6692 Changed CouponTenorVisitor to return a set of tenors to support averaged index coupons

Conflicts:
	projects/OG-Financial/src/main/java/com/opengamma/financial/analytics/model/fixedincome/FloatingLegCashFlows.java
PLAT-6692 Renamed expandIndexTenors to formatIndexTenors
PLAT-6692 Changed signatures to use Lists instead of arrays