Added regex escaping for request body matching

accurest-core/src/main/groovy/io/coderate/accurest/builder/SpockMethodBodyBuilder.groovy

@@ -23,7 +23,9 @@ class SpockMethodBodyBuilder {
 			blockBuilder.addLine(".header('$it.key', '$it.value.equalTo')")
 		}
 		if (stubDefinition.request.bodyPatterns) {
-			blockBuilder.addLine(".body('${JsonOutput.toJson(stubDefinition.request.bodyPatterns[0].matches)}')")
+			String matches = stubDefinition.request.bodyPatterns[0].matches
+			matches = matches.replaceAll('\\\\', '');
+			blockBuilder.addLine(".body('${JsonOutput.toJson(matches)}')")
 		}
 
 		blockBuilder.unindent().endBlock().addEmptyLine()

accurest-core/src/main/resources/stubs/wiremocks/sample.json

@@ -9,7 +9,7 @@
     },
     "bodyPatterns": [
       {
-        "matches": "{\"client\":{\"pesel\":\"1234567890\"},\"loanApplicationId\":123123123,\"amount\":123.123}"
+      "matches": "\\{\"clientPesel\":\"1234567890\",\"loanAmount\":123.123\\}"
       }
     ]
   },