[CDE-207] Olap4j datasource's property "property" has no tooltip and is of unknown purpose
	-	"property" property is by code design a key-value Map; this was currently not the declared configuration, therefore setting any value in this property was causing a NullPointerException
[CDE-207] Olap4j datasource's property "property" has no tooltip and is of unknown purpose
	- added unit test
	- added log4j capabilities ( missing log4j.xml in /test-src and log4j in /test-lib )
Merge pull request #122 from pedrofvteixeira/CDE-207

[CDE-207] Olap4j datasource's property "property" has no tooltip and is ...