SQL: Fix fulltext CSV spec tests (elastic/x-pack-elasticsearch#2608)

Column type autodetect of integer types is broken in JDBC CSV library when it is used in tr-TR locale. The library is using toLowerCase() calls with default locale, which causes it to convert autodetected type name "Int" to lowercase "ınt" in tr-TR locale and not recognize it as an int type afterwards.

This commit adds a temporary workaround that makes the prevents that test from failing by specifying explicit column types in all tests where integer columns are present.

Original commit: elastic/x-pack-elasticsearch@86ca2acd8c

qa/sql/src/main/resources/fulltext.csv-spec

@@ -5,27 +5,27 @@
 simpleQueryAllFields
 SELECT emp_no, first_name, gender, last_name FROM test_emp WHERE QUERY('Baek fox') LIMIT 3;
 
-    emp_no     |  first_name   |    gender     |   last_name
+   emp_no:i    | first_name:s  |   gender:s    |  last_name:s
 10080          |Premal         |M              |Baek
 ;
 
 simpleQueryDedicatedField
 SELECT emp_no, first_name, gender, last_name FROM test_emp WHERE QUERY('Man*', 'fields=last_name') LIMIT 5;
 
-    emp_no     |  first_name   |    gender     |   last_name
+   emp_no:i    | first_name:s  |   gender:s    |  last_name:s
 10096          |Jayson         |M              |Mandell
 ;
 
 matchQuery
 SELECT emp_no, first_name, gender, last_name FROM test_emp WHERE MATCH(first_name, 'Erez');
 
-    emp_no     |  first_name   |    gender     |   last_name
+   emp_no:i    | first_name:s  |   gender:s    |  last_name:s
 10076          |Erez           |F              |Ritzmann
 ;
 
 multiMatchQuery
 SELECT emp_no, first_name, gender, last_name FROM test_emp WHERE MATCH('first_name,last_name', 'Morton', 'type=best_fields;default_operator=OR');
 
-    emp_no     |  first_name   |    gender     |   last_name
+   emp_no:i    | first_name:s  |   gender:s    |  last_name:s
 10095          |Hilari         |M              |Morton
 ;