mergeDataSets fails when blank value is used for merging

To use mergeDatasets feature we should add ‘empty.yml’ dataset to class level. In other case we will receive error:

	at com.github.database.rider.core.dataset.DataSetExecutorImpl.loadDataSet(DataSetExecutorImpl.java:295)
	at com.github.database.rider.core.dataset.DataSetExecutorImpl.loadDataSets(DataSetExecutorImpl.java:305)
	at com.github.database.rider.core.dataset.DataSetExecutorImpl.createDataSet(DataSetExecutorImpl.java:149)
	... 74 more

It can be fixed simply by removing null and empty strings after merge.

public static DataSet mergeDataSetAnnotations(DataSet classLevelDataSet, DataSet methodLevelDataSet) {
        //only the lists are merged
        String[] value = joinArray(classLevelDataSet.value(), methodLevelDataSet.value());
        value = removeEmptyAndNullElements(value);
        ...
        return mergedDataSet;
    }
    public static String[] removeEmptyAndNullElements(String[] values) {
        List<String> result = new ArrayList<>(values.length);
        for(String value:values){
            if(value != null && !value.trim().isEmpty()) {
                result.add(value);
            }
        }
        return result.toArray(new String[0]);
    }

[RomashkoVictor]

Great, thanks=)

[rmpestano]

The fix will be available in v1.17.0 to be released today, thank you guys.