Exercise cleanup

* Make common steps consistent
* Make comments consistent

aggregates.sh
boot_from_volume.sh
client-args.sh
client-env.sh
euca.sh
floating_ips.sh
sec_groups.sh
swift.sh
volumes.sh

Change-Id: Ib93dcdfdead93c259e3cd184fbc5ccc0a4a87c9a
diff --git a/exercises/swift.sh b/exercises/swift.sh
index 4cd487b..a75f955 100755
--- a/exercises/swift.sh
+++ b/exercises/swift.sh
@@ -2,7 +2,7 @@
 
 # **swift.sh**
 
-# Test swift via the command line tools that ship with it.
+# Test swift via the ``swift`` command line from ``python-swiftclient`
 
 echo "*********************************************************************"
 echo "Begin DevStack Exercise: $0"
@@ -33,13 +33,13 @@
 # Import exercise configuration
 source $TOP_DIR/exerciserc
 
-# Container name
-CONTAINER=ex-swift
-
 # If swift is not enabled we exit with exitcode 55 which mean
 # exercise is skipped.
 is_service_enabled swift || exit 55
 
+# Container name
+CONTAINER=ex-swift
+
 
 # Testing Swift
 # =============