fmbt-trace-share: added --kill-session parameter
fmbt-trace-share: added --kill-session parameter

Kills existing trace share session, enables an easy way to start
new sessions.

rseymour/fMBT,heivi/fMBT,pombreda/fMBT,heivi/fMBT,giantpinkwalrus/fMBT,rseymour/fMBT,pombreda/fMBT,violep01/fMBT,acozzette/fMBT,acozzette/fMBT,giantpinkwalrus/fMBT,giantpinkwalrus/fMBT,01org/fMBT,mlq/fMBT,heivi/fMBT,01org/fMBT,rseymour/fMBT,01org/fMBT,giantpinkwalrus/fMBT,violep01/fMBT,rseymour/fMBT,violep01/fMBT,mlq/fMBT,yoonkiss/fMBT,heivi/fMBT,violep01/fMBT,pombreda/fMBT,mlq/fMBT,yoonkiss/fMBT,acozzette/fMBT,mlq/fMBT,01org/fMBT,yoonkiss/fMBT,rseymour/fMBT,acozzette/fMBT,mlq/fMBT,heivi/fMBT,rseymour/fMBT,yoonkiss/fMBT,mixu-/fMBT,pombreda/fMBT,heivi/fMBT,mixu-/fMBT,pombreda/fMBT,violep01/fMBT,giantpinkwalrus/fMBT,mixu-/fMBT,acozzette/fMBT,mixu-/fMBT,heivi/fMBT,pombreda/fMBT,mlq/fMBT,mlq/fMBT,yoonkiss/fMBT,mixu-/fMBT,01org/fMBT,pombreda/fMBT,rseymour/fMBT