XD-753 Batch Repo host needs to be in props file

The jdbc host for the batch repo was only declared in the batch.xml.

It has been replaced with a property setting in the conf/hsqldb.properties file.

Host default is localhost.

Also I changed the default dbname from test to xdjob.

XD-753 Code Review changes implemented

Removed defaults from batch.xml

Changed hostname to host in JobRepoTests