Trailing spaces in properties result in the property not being set

[reshmabidikar]

Steps to reproduce:

1. Set org.killbill.server.test.mode=true . (Trailing space after true)
2. Start KB server
3. Move the clock - an error occurs.

This would need to be fixed for properties belonging to all data types.

[reshmabidikar]

According to Pierre, the issue might be here.

[maishivamhoo123]

@team can i work on this issue?