Warning when multiple steps included and :src-jar-path specified

[gareth625]

When multiple steps are specified and :src-jar-path is specified for the cluster an unnecessary warning

2014-05-08 16:52:24,484  WARN evaluating-map:? - No value for :step-jar. But this key does exist in step(s): ("a-step"). Maybe you need to define the key in defcluster instead?

is produced e.g.

(def cluster the-cluster ...
  :jar-name "my-latest-compile.jar"
  :jar-src-path "./target/${jar-name}" ...)

(def step a-step ...
  :step-jar "/home/hadoop/lib/emr-s3distcp-1.0.jar" ...)

(def step another-step ...
  :step-jar "${jar-uri}/${jar-name}" ...)

If :runtime-jar is specified in the cluster instead of :jar-src-path then the warning is not produced. See https://groups.google.com/forum/#!topic/lemur-user/gMZC3n38Ht4 for a discussion of this problem.