Fix failing test testUpdateChart().

When a new chart updates the old chart, the title, along with other
properties, of the new chart is disregarded. The new chart's properties
are modified to match the existing panel.
-Added package org.jfree.chart.encoded to tests source folder
-Added test suite for package org.jfree.chart.encoded
-Added test class KeypointPNGEncodedAdapterTests for
class KeypointPNGEncodedAdapter
-Modified AllTestSuitesTests to account the new test class
KeypointPNGEncodedAdapterTests