Factored common functionality out of the Courgette stress test scripts

courgette/stress_test_common

Index: courgette/stress_test_common
diff --git a/courgette/stress_test_common b/courgette/stress_test_common
new file mode 100755
index 0000000000000000000000000000000000000000..d61006d5a84efc386649e6375c698410b01c6de9
--- /dev/null
+++ b/courgette/stress_test_common
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# Emit an error message
+error() {
+  echo "error: ${@}" >&2
+}
+
+# Given a token, search for and count the instances of lines from the
+# logfile that start with the token.
+count_result() {
+  if [ ! -z "${1}" ]; then
+    echo $(cat "${log}" | grep "^${1} " | wc -l)    
+  else
+    echo 0
+  fi
+}