Mocks are skipped if path is not found in JSONPath

[nixxxon]

Describe the bug
JSONPath returns error if path is not found which breaks the loop in findMockForRequest, skipping the rest of the mocks.

To Reproduce
Steps to reproduce the behavior:

1. Create two POST mocks with different paths and JSONPath.
2. Send two requests with different json-payload.

My mocks look like this:

srv.Mocha.AddMocks(
	mocha.Post(expect.URLPath("/document/edit")).
		Body(
			expect.JSONPath("document_id", expect.ToEqual(float64(1337))),
		))

srv.Mocha.AddMocks(
	mocha.Post(expect.URLPath("/party/edit")).
		Body(
			expect.JSONPath("party_id", expect.ToEqual(float64(1337))),
		))

Expected behavior
The test should succeed, both mocks should be tested. Instead, the second mock is not tested since the second request fails on the first mock. Why is the first mock tested even if the request path does not match with the second request?

Additional context
Returning nil instead of err here https://github.com/vitorsalgado/mocha/blob/3.x/expect/jsonpath.go#L22 fixes my tests.