Fix two bash warnings in the test/run scripts
Fix two bash warnings in the test/run scripts

When calling readline do not use the -z option.
From the readline manpage
       -z, --zero
              end each output line with NUL, not newline

This fixes the following two bash warnings

test/run: line 11: warning: command substitution: ignored null byte in input
test/run: line 12: warning: command substitution: ignored null byte in input

openshift/sti-nodejs,openshift/sti-nodejs