Test null types for double/integers

[sonalgoyal]

Build test cases with

csv with double and schema as double

• what is the value returned by getAs when the values are null/0.5 gbp/gbp as values?

ditto for integers

[navinrathore]

sample input data and its internal output

Test Input		Test Output
Double	Integer	Double	Integer
0.55	55	0.55	55
1.234	1234	1.234	1234
34	gbp	34	null
99.56	9956	99.56	9956
56gbp	56	null	56
23	23gbp	23	null
	45	null	45
65		65	null
		null	null
0.5 gbp	23	null	23
56	56	56	56
$	64	null	null
null	34	null	34
78	null	78	null
78	87	78	87