skypiax: do not add delay when a sleep() or play() are executed by a script after answer() and before sending audio. MODSKYPIAX-29 MODSKYPIAX-58

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15585 d0543943-73ff-0310-b7d9-9358b9ac24b2