EmailClient Fixes

[sumitchawla]

No description provided.

[sumitchawla]

If emaillist is not configured then it produces following warning:

javax.mail.internet.AddressException: Illegal address in string ``''
    at javax.mail.internet.InternetAddress.<init>(InternetAddress.java:110)
    at javax.mail.internet.InternetAddress.<init>(InternetAddress.java:135)
    at com.linkedin.camus.etl.kafka.common.EmailClient.sendEmail(EmailClient.java:75)
    at com.linkedin.camus.etl.kafka.mapred.EtlInputFormat.getSplits(EtlInputFormat.java:442)
    at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:597)
    at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:614)
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:492)
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1296)
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1293)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1293)
    at com.linkedin.camus.etl.kafka.CamusJob.run(CamusJob.java:354)
    at com.linkedin.camus.etl.kafka.CamusJob.run(CamusJob.java:235)
    at com.linkedin.camus.etl.kafka.CamusJob.run(CamusJob.java:690)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.linkedin.camus.etl.kafka.CamusJob.main(CamusJob.java:645)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    at org.apache.hadoop.util.RunJar.main(RunJar.java:136)

[zliu41]

LGTM. Thanks.