TN: TN-107 issues (both parts)

[rickmastfan67]

Erwin: (main file)

US11E -> US11E/321 ? Both US routes there.
*shaping point north of I-26* -> Maybe place it @ Walnut Dr instead to give people a chance to clinch a little bit of mileage? Would also need to be tweaked in TN-81.
JonRd_E -> 2ndSt_E
MainAve -> MainAve_S

TN107Del:

End -> RouMtnRd & shift location to the intersection.

[mapcat]

https://github.com/TravelMapping/HighwayData/pull/7752

Re the main segment, MainAve_S is an alt name for a different point (in use). And if someone has driven the two blocks between I-26 and Walnut Dr and wants a point there, they can ask for it.