Simplify die_if_error

* Replace die_if_error() with the simpler die()
* Attempt to clean up unnecessary trace output
* Formatting cleanups on all exercise scripts

Change-Id: I72a542b3a59ee9bf12bee6bcc605edd7579205e0
diff --git a/exercises/client-env.sh b/exercises/client-env.sh
index 0f17275..af2c4c2 100755
--- a/exercises/client-env.sh
+++ b/exercises/client-env.sh
@@ -2,9 +2,9 @@
 
 # Test OpenStack client enviroment variable handling
 
-echo "**************************************************"
+echo "*********************************************************************"
 echo "Begin DevStack Exercise: $0"
-echo "**************************************************"
+echo "*********************************************************************"
 
 # Verify client workage
 VERIFY=${1:-""}
@@ -149,8 +149,8 @@
 report "Glance" $STATUS_GLANCE
 report "Swift" $STATUS_SWIFT
 
-echo "**************************************************"
-echo "End DevStack Exercise: $0"
-echo "**************************************************"
+echo "*********************************************************************"
+echo "SUCCESS: End DevStack Exercise: $0"
+echo "*********************************************************************"
 
 exit $RETURN