addition of new test case proposed in issue

Author: TheRazorace

test-cases/RMLTC0026b-JSON/README.md

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+## RMLTC0026a-JSON
+
+**Title**: "Generation of triples from arrays"
+
+**Description**: "Tests the generation of triples from array input data structures"
+
+**Error expected?** No
+
+**Input**
+```
+{
+  "persons": [
+    {"fname":"Bob","lname":"Smith","amounts":[30, 40, 50]}
+  ]
+}
+
+```
+
+**Mapping**
+```
+@prefix ex: <http://example.com/> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix rml: <http://w3id.org/rml/> .
+
+<http://example.com/base/TriplesMap1> a rml:TriplesMap;
+  rml:logicalSource [ a rml:LogicalSource;
+      rml:iterator "$.persons[*]";
+      rml:referenceFormulation rml:JSONPath;
+      rml:source [ a rml:RelativePathSource;
+          rml:root rml:MappingDirectory;
+          rml:path "persons.json"
+        ]
+    ];
+  rml:predicateObjectMap [
+      rml:objectMap [
+          rml:reference "$.amounts"
+        ];
+      rml:predicate ex:amount
+    ];
+  rml:subjectMap [
+      rml:template "http://example.com/Student/{$.fname}/{$.lname}"
+    ] .
+
+```
+
+**Output**
+```
+<http://example.com/Student/Bob/Smith> <http://example.com/amount> "30" .
+<http://example.com/Student/Bob/Smith> <http://example.com/amount> "40" .
+<http://example.com/Student/Bob/Smith> <http://example.com/amount> "50" .
+
+```
+

test-cases/RMLTC0026b-JSON/mapping.ttl

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+@prefix ex: <http://example.com/> .
+@prefix foaf: <http://xmlns.com/foaf/0.1/> .
+@prefix rml: <http://w3id.org/rml/> .
+
+<http://example.com/base/TriplesMap1> a rml:TriplesMap;
+  rml:logicalSource [ a rml:LogicalSource;
+      rml:iterator "$.persons[*]";
+      rml:referenceFormulation rml:JSONPath;
+      rml:source [ a rml:RelativePathSource;
+          rml:root rml:MappingDirectory;
+          rml:path "persons.json"
+        ]
+    ];
+  rml:predicateObjectMap [
+      rml:objectMap [
+          rml:reference "$.amounts"
+        ];
+      rml:predicate ex:amount
+    ];
+  rml:subjectMap [
+      rml:template "http://example.com/Student/{$.fname}/{$.lname}"
+    ] .

test-cases/RMLTC0026b-JSON/persons.json

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+{
+  "persons": [
+    {"fname":"Bob","lname":"Smith","amounts":[30, 40, 50]}
+  ]
+}