ik-server travis test passed with "Use jsk_travis #97"

see #97 .

ik-server travis test was failed because euslisp directory was not installed in share directory, besides, in travis environment, ik-server was slow to start ros node, so, sleep while ik-server not started was added.

my travis result here. 
https://travis-ci.org/s-noda/jsk_control/jobs/37456213