GMPLS update - 42: updating custom GMPLS in-segment configuration entries

Updated #indexing information for #custom #in-segment #configuration in GMPLS module. Updated #agent #traversal routines and #mapper routine respectively for the indexing update. These changes access the custom in-segment entries directly from the #standard #in-segment entries. This will access the in-segment entries by using the #native #indexing. This removes references to the custom in-segment indexing used earlier. The custom MPLS in-segment #entries add support for #media #specific labels ( #Ethernet / #SONET / #SDH / #OTN ) by maintaining the GMPLS #label-type and #label-value #attributes.

#GMPLS update 42 ...
[commit 407e243821944317e762311fae752c0c885aaa1c] (https://github.com/nes-repo/NES-Open-Switch/commit/407e243821944317e762311fae752c0c885aaa1c)