LPS-43134 New constants have been created to reference name and values for preferences in the test.
LPS-43134 The test testGetPortletPreferencesCountByOwnerLayoutPortletNotDefault has been simplified.
LPS-43134 New methods have been added to increase the coverage of PortletPreferencesLSI (getPreferences)
LPS-43134 A Mock class has been added to test especial conditions when the method getStrictPreferences is called.
LPS-43134 	New method to Assert StrictPortletPreferences.
LPS-43134 New methods have been added to increase the coverage of PortletPreferencesLSI (updatePreferences)
LPS-43134 The method getTestPortlet is never used when only one portlet is needed. The variable _portlet is used instead.
LPS-43134 The method getTestPortlet is never used when only one portlet is needed. The variable _portlet is used instead.
LPS-43134 New asserts have been added to the test of the add methods
LPS-43134 Removed of the variable group2, because it's never used
LPS-43134 New asserts have been added to the test of the fetch and delete methods