Simplify samples used in documentation (#268)

samples/standalone/dsl/http-server/src/test/resources/contracts/fraud/shouldMarkClientAsFraud.groovy

@@ -9,7 +9,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 			   loanAmount: 99999
 		])
 		headers { // (5)
-			contentType('application/vnd.fraud.v1+json')
+			contentType('application/json')
 		}
 	}
 	response { // (6)
@@ -19,7 +19,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 			   rejectionReason: "Amount too high"
 		])
 		headers { // (9)
-			contentType('application/vnd.fraud.v1+json')
+			contentType('application/json')
 		}
 	}
 }
@@ -42,12 +42,12 @@ From the Consumer perspective, when shooting a request in the integration test:
 (4) - with the JSON body that
  * has a field `clientId` that matches a regular expression `[0-9]{10}`
  * has a field `loanAmount` that is equal to `99999`
-(5) - with header `Content-Type` equal to `application/vnd.fraud.v1+json`
+(5) - with header `Content-Type` equal to `application/json`
 (6) - then the response will be sent with
 (7) - status equal `200`
 (8) - and JSON body equal to
  { "fraudCheckStatus": "FRAUD", "rejectionReason": "Amount too high" }
-(9) - with header `Content-Type` equal to `application/vnd.fraud.v1+json`
+(9) - with header `Content-Type` equal to `application/json`
 
 From the Producer perspective, in the autogenerated producer-side test:
 
@@ -57,10 +57,10 @@ From the Producer perspective, in the autogenerated producer-side test:
 (4) - with the JSON body that
  * has a field `clientId` that will have a generated value that matches a regular expression `[0-9]{10}`
  * has a field `loanAmount` that is equal to `99999`
-(5) - with header `Content-Type` equal to `application/vnd.fraud.v1+json`
+(5) - with header `Content-Type` equal to `application/json`
 (6) - then the test will assert if the response has been sent with
 (7) - status equal `200`
 (8) - and JSON body equal to
  { "fraudCheckStatus": "FRAUD", "rejectionReason": "Amount too high" }
-(9) - with header `Content-Type` matching `application/vnd.fraud.v1+json.*`
+(9) - with header `Content-Type` matching `application/json.*`
  */

samples/standalone/dsl/http-server/src/test/resources/contracts/fraud/shouldMarkClientAsNotFraud.groovy

@@ -12,7 +12,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 					"""
 					)
 					headers {
-						contentType("application/vnd.fraud.v1+json")
+						contentType("application/json")
 					}
 
 				}
@@ -23,7 +23,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 						rejectionReason: $(consumer(null), producer(execute('assertThatRejectionReasonIsNull($it)')))
 				)
 				headers {
-					contentType("application/vnd.fraud.v1+json")
+					contentType("application/json")
 				}
 			}
 

samples/standalone/dsl/http-server/src/test/resources/contracts/fraud/shouldReturnFraudStats.groovy

@@ -15,7 +15,7 @@ import org.springframework.cloud.contract.spec.Contract
 						count: 200
 				])
 				headers {
-					contentType("application/vnd.fraud.v1+json")
+					contentType("application/json")
 				}
 			}
 		},
@@ -30,7 +30,7 @@ import org.springframework.cloud.contract.spec.Contract
 						count: 100
 				])
 				headers {
-					contentType("application/vnd.fraud.v1+json")
+					contentType("application/json")
 				}
 			}
 		}

samples/standalone/dsl/http-server/src/test/resources/contracts/fraudname/shouldReturnAFraudForTheName.groovy

@@ -10,7 +10,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 			   name: "fraud"
 		])
 		headers {
-			contentType("application/vnd.fraud.v1+json")
+			contentType("application/json")
 		}
 	}
 	response {

samples/standalone/dsl/http-server/src/test/resources/contracts/fraudname/shouldReturnNonFraudForTheName.groovy

@@ -8,7 +8,7 @@ org.springframework.cloud.contract.spec.Contract.make {
 			   name: $(anyAlphaUnicode())
 		])
 		headers {
-			contentType("application/vnd.fraud.v1+json")
+			contentType("application/json")
 		}
 	}
 	response {