jdbc.url for mssql is mistyped

the mistyping may mislead users to waste time on Microsoft SQLServer configuration, as I've found in the following forum thread:
http://forums.activiti.org/content/activiti-installation-oracle-or-mssql#comment-26278
for Microsoft SQLServer JDBC url, "databaseName=" is a must.
Update ch03-Configuration.xml
Update ch03-Configuration.xml
Update ch03-Configuration.xml
Update ch03-Configuration.xml
Merge pull request #416 from tiancheng2000/patch-1

jdbc.url for mssql is mistyped