testing: remove old test scripts in src/test
flux-start: set session id to pid of flux-start

This applies to local session only:  use pid of flux-start for
session id instead of letting the default of '0' be used.
This allows concurrent local sessions.  Fixes issue #13.
Merge pull request #70 from garlick/test-tidy

testing: remove old test scripts in src/test
Merge pull request #72 from garlick/unique-local-sid

flux-start: set session id to pid of flux-start
flux: lua -C and -L options were reversed
Merge pull request #73 from garlick/flux-args

flux: lua -C and -L options were reversed