[WIP][CARBONDATA-3079] Improve the C++ SDK read performance by merging column in JNI

[xubo245]

supprt readNextStringRow and readNextBatchStringRow

The performance between CSDK and SDK(40 million recodes, print num is 100000,6 columns)
This table show: don' t get column, only get row(Object array).

Batch size	SDK				CSDK1(don’t get column)				CSDK(don’t get clomun)	CSDK2(get column)
	1	2	3	avg	1	2	3	avg	SDK/CSDK1	1	2	3	avg	CSDK2/CSDK1
100000	1523573	1474790	1449569	1482644	1380077	1380772	1348124	1369658	1.082	279265	282142	288975	283461	0.207
32000	1547971	1510519	1516607	1525032	1382393	1392961	1391146	1388833	1.098	279020	285982	284344	283115	0.204
10000	1604480	1538599	1574839	1572639	1392247	1413682	1426892	1410940	1.115	293650	289586	278339	287192	0.204
1000	1553553	1555251	1601713	1570172	1425066	1406788	1400285	1410713	1.113	289310	288588	289952	289283	0.205
100	1545616	1577918	1559186	1560907	1376255	1382642	1386771	1381889	1.130	280351	280218	282870	281146	0.203
10	1509486	1511429	1493751	1504889	1209469	1236183	1208908	1218187	1.235	250760	277940	267380	265360	0.218
1	1161568	1128954	1184135	1158219	650563	620164	617285	629337	1.840	228316	215732	227424	223824	0.356
	SDK(get column)
	1540277	1509318	1554487	1534694
				1.006

Be sure to do all of the following checklist to help us incorporate
your contribution quickly and easily:

• Any interfaces changed?

• Any backward compatibility impacted?

• Document update required?

• Testing done
  Please provide details on
  - Whether new unit test cases have been added or why no new tests are required?
  - How it is tested? Please attach test report.
  - Is it a performance related change? Please attach the performance test report.
  - Any additional information to help reviewers in testing this change.

• For large changes, please consider breaking it into sub-tasks under an umbrella JIRA.

[CarbonDataQA]

Build Success with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder2.1/1349/

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Build Failed with Spark 2.3.1, Please check CI http://136.243.101.176:8080/job/carbondataprbuilder2.3/9607/

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Build Success with Spark 2.2.1, Please check CI http://95.216.28.178:8080/job/ApacheCarbonPRBuilder1/1559/

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Build Success with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder2.1/1537/

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Build Success with Spark 2.2.1, Please check CI http://95.216.28.178:8080/job/ApacheCarbonPRBuilder1/1748/

[CarbonDataQA]

Build Success with Spark 2.3.1, Please check CI http://136.243.101.176:8080/job/carbondataprbuilder2.3/9796/

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Build Success with Spark 2.1.0, Please check CI http://136.243.101.176:8080/job/ApacheCarbonPRBuilder2.1/1979/

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Build Success with Spark 2.3.2, Please check CI http://136.243.101.176:8080/job/carbondataprbuilder2.3/10231/

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Build Success with Spark 2.2.1, Please check CI http://95.216.28.178:8080/job/ApacheCarbonPRBuilder1/2252/

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Build Failed with Spark 2.1.0, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.1/53/

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Build Failed with Spark 2.3.2, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.3/52/

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Build Success with Spark 2.1.0, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.1/441/

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Build Success with Spark 2.3.2, Please check CI http://121.244.95.60:12545/job/ApacheCarbonPRBuilder2.3/709/

[CarbonDataQA1]

Build Failed with Spark 2.4.4, Please check CI http://121.244.95.60:12545/job/ApacheCarbon_PR_Builder_2.4.4/54/