Adding the tests to the new ocr methods.

api/ocr/features/ocr.feature

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+Feature: The OCR API client
+# ======================== OCR method ========================
+    Scenario: Using the OCR standard method
+        Given the OCR client
+        When the OCR method is called
+        Then there must be an dictionary as a return
+    
+# ======================== Strings method ========================
+    Scenario: Using the Strings method
+        Given the OCR client
+        And an OCR object
+        When the Strings method is called
+        Then there must be a list of dictionaries with the content read and other info