adding a sleep after a cpir part1 is launched

Docker/experiments-cpir.sh

@@ -7,6 +7,7 @@ echo $A
 echo $B
 docker exec -w /root/duoram/cpir-read/cxx party1 ./spir_test1 $A 15 4 100 2 &
 echo "P1 launched"
+sleep 2;
 docker exec -w /root/duoram/cpir-read/cxx party0 ./spir_test0 $B 15 4 100 2 &
 echo "P0 launched"
 wait