ZKConfig fails to return proper value on getBoolean() when user accidentally includes spaces at the end of the value

I was using ZooKeeper client in WebSphere Liberty and attempting to configure SSL/TLS for client connections.

To do so, I must add the system property zookeeper.client.secure=true.  In WebSphere Liberty, java system properties are placed in a file called bootstrap.properties - each property on a separate line.  I accidentally added a space at the end of the line.  When ZKConfig.getBoolean() attempted to convert this string to a boolean, it returned false due to the space at the end.

ZKConfig.getBoolean() should trim the string before attempting to convert to a boolean.