updated method names in Configuration.java and samples
Merge branch 'dev-sampleUpdate' of https://github.com/paypal/adaptivepayments-sdk-java into dev-sampleUpdate

Conflicts:
	adaptivepaymentssample/IPN-README.md
	adaptivepaymentssample/src/main/java/com/sample/adaptivepayments/Configuration.java
	adaptivepaymentssample/src/main/java/com/sample/ipn/IPNListenerServlet.java