GMPLS update - 63: updating standard GMPLS tunnel error agent mapper routines

Updated #standard #extended GMPLS #tunnel #error agent routines in GMPLS module. The agent #iterator routines and #mapper #routine has been updated to use standard #tunnel #based #indexing. This will access the extended tunnel error entries #embedded in the standard #MPLS #tunnel entries and there by removing the redundant indexing. The extended tunnel error entries contain attributes like the #error-type - the kind of error happened on the tunnel (e.g. local configuration error, local dynamic state - shortage of resources, path not found - issues, network protocol failures, etc ...), #error-time, #error-reporter, related #error-tlvs and #error-description, etc ...

#GMPLS update 63 ...
[commit 9b37b1ff1c96d1367928925588dc15381b7b86b4] (https://github.com/nes-repo/NES-Open-Switch/commit/9b37b1ff1c96d1367928925588dc15381b7b86b4)