Ensure use of "echo_i" where possible

In many instances 'echo "I:' construct was used where echo_i function
should have been.

bin/tests/system/resolver/tests.sh

@@ -10,7 +10,6 @@
 # information regarding copyright ownership.
 
 . ../conf.sh
-echo .
 
 DIGOPTS="-p ${PORT}"
 RESOLVOPTS="-p ${PORT}"