[#2154] fix NPE on @On annotation #1219
Description
play1/framework/src/play/jobs/JobsPlugin.java
Line 195 in 2338f92
evaluates to null, if there is no application configuration.
The @On annotation does not allow a default value which could be provided for getProperty. Therefore the default should be "".
Reason:
play1/framework/src/play/jobs/JobsPlugin.java
Line 197 in 2338f92
will throw a NPE if
cron is null.