Fix ignore test from DynamicReportsServiceSpec

[snimavat]

The test started failing with 3.3.9
The issue seems to have some thing to do with the metaclass
Bills.customer field is not being recognized as Association by gorm.

That is because the ClassPropertyFetcher.getMetaProperties does not have the Customer in returned list.

It has some thing to do with groovy meta class and CachedClass

for Bills
theMetaClass.getProperties() does not have a property in the list returned — even though it exists in class. But Doing theMetaClass.theClass.getDeclaredFields() contains the field though.