Added new FEC Mode definitions in CISCO-OTN-IF-MIB.my #156
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Added following Fecmodes in CISCO-OTN-IF-MIB.my:
enableEnhancedSD20(9),
enableEnhancedSD15(10),
enableEnhancedSD27(11),
enableSD15DE(12),
enableStaircaseDE(13),
enableOFEC(14),
enableCFEC(15)