OLE FS Maven Integration

Runtime property resolution is now possible for OLE FS!
This means the exact same war file can be used for development as well as being deployed on multiple servers without altering the binary
Automatically loaded external configuration files are used to reconfigure the binary with machine specific configuration
It also allows users to specify a single property as the external directory for OLE FS to use
1. Properties pointing to other machine specific directories are then automatically derived at runtime
2. This way only a single property needs to be overridden (instead of all of them)
The following external locations are automatically checked and loaded, in this order, if they exist
1. ```
~/.kuali/ole/fs/configuration.properties
```
2. If the system property olefs.configuration is set, the properties file it points to is automatically loaded
If the property ole.fs.runtime.property.expansion=true the following actions are also taken
1. After loading classpath:configuration.properties load classpath:olefs-default.properties
2. Expand any properties containing placeholders into their fully resolved equivalents

A default logging configuration is now bundled into OLE FS
This means logging will work out of the box without requiring you to point OLE FS at an external log4j.properties file
You can still override the default log4j configuration if desired
1. set the property
```
ole.fs.log4j.override=true
```
  1. This can be set as a system property
  2. Or as a property in one of the configuration files that gets automatically loaded
2. create a log4j.properties containing your custom settings at
```
~/.kuali/ole/fs/log4j.properties
```
Any logging added to the application from now on should use SLF4J
As code gets updated, log4j logging statements should get replaced with SLF4J logging statements

Property	Default Value	Description
olefs.configuration	None	If this system property is set, properties are loaded from the location it points to. Properties supplied here, override internal properties
ole.fs.runtime.property.expansion=true/false	true	If true, property expansion is performed at runtime instead of at build time. The resource `classpath:olefs-default.properties` is loaded if this property is set to true
ole.fs.log4j.override=true/false	false	Set this to true if you want to override the default log4j.properties supplied with the application. This also allows you to alter the log4j configuration at runtime without restarting the application. The log4j.properties file supplied here is monitored by a background thread. It is automatically reloaded when changes are detected.