Implementation of review comments for classpath and jar

resourceFactories
This is related to the way we are handling extensions in non-osgi environment. As you know, we are externalising the properties associated with  an extension in a properties file - so there are two properties files whose name is com.ibm.jaggr.core.impl.resource.ClasspathResourceFactory.properties and com.ibm.jaggr.core.impl.resource.JarResourceFactory.properties. In these files, we are having scheme as classpath in the first and jar in the second. 
So if we are going to use the ClasspathResourceFactory for two schemes, we need to have a method to mention comma separated values for the scheme types.