OOZIE-1204 Illustrate correct use of parameters inside SLA tags (jun aoki via mona)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1454072 13f79535-47bb-0310-9956-ffa450edef68
OOZIE-1191 add examples of coordinator with SLA tag inserted (ryota via mona)

git-svn-id: https://svn.apache.org/repos/asf/oozie/trunk@1454079 13f79535-47bb-0310-9956-ffa450edef68