added descriptive javadoc for is/getValidInput
added descriptive javadoc for is/getValidInput
ibnemahdi/owasp-esapi-java,ibnemahdi/owasp-esapi-java,ibnemahdi/owasp-esapi-java,Fierozen/owasp-esapi-java,Fierozen/owasp-esapi-java,Fierozen/owasp-esapi-java