[MONDRIAN-1061] - junit tests added

junit tests added to reproduce java.lang.StackOverflowError

	new file:   testsrc/main/mondrian/rolap/FoodMartRecursion.xml
	modified:   testsrc/main/mondrian/rolap/VirtualCubeTest.java
[MONDRIAN-1061] - java.lang.StackOverflowError resulting from recursive calculated member usage within virtual cube

fix added to avid recursion loop

	modified:   src/main/mondrian/rolap/RolapCube.java