Make init scripts Python version agnostic

Now that the Tautulli will run on both major versions of Python we can 
remove the specificity in the init scripts and make them simpler, with 
the added advantage that some OS's will now run Tautulli through Python 
3 instead of Python 2.

init-scripts/init.freenas

@@ -51,7 +51,7 @@ verify_tautulli_pid() {
     # Make sure the pid corresponds to the Tautulli process.
     if [ -f ${tautulli_pid} ]; then
       pid=`cat ${tautulli_pid} 2>/dev/null`
-      ps -p ${pid} | grep -q "python2 ${tautulli_dir}/Tautulli.py"
+      ps -p ${pid} | grep -q "python ${tautulli_dir}/Tautulli.py"
       return $?
     else
       return 0