ONOS-737: regexp for grabbing OC* variables changed

Change-Id: Id5651ffb41230a39c6ed68e1605feaf3c0aa337b
diff --git a/tools/test/bin/onos-iterm-logs b/tools/test/bin/onos-iterm-logs
index b160c6e..d1c93d6 100755
--- a/tools/test/bin/onos-iterm-logs
+++ b/tools/test/bin/onos-iterm-logs
@@ -4,7 +4,7 @@
 #-------------------------------------------------------------------------------
 
 cellName=$ONOS_CELL
-nodeCount=$(env | egrep "OC[0-9]+" | wc -l | tr -d ' ')
+nodeCount=$(env | egrep "^OC[0-9]+" | wc -l | tr -d ' ')
 
 osascript -e "
 tell application \"iTerm\"