Marathon-LB v1.12.3

Noteworthy changes(s):

• Follow redirects from non-leaders in Marathon 1.7

Full changelog:

v1.12.2...v1.12.3

Shortlog:

$ git shortlog v1.12.2..v1.12.3
GP ✅ (1):
      Follow redirects from non-leaders in Marathon 1.7 (#595)

Hans Gogia (1):
      replaced libcurl3 to libcurl4 (#597)