Endless loop when path contains { without paired "}"

[kool79]

Steps to reproduce

 var url = "http://server.com/api/product{xxx" // this url may come from uny source
 RestAssured.given().get(url);

Actual: endless loop
Expected: url is sent with properly encoded characters in path: GET http://server.com/api/product%7Bxxx

Note that character "}" is properly encoded when used in url.

Endless loop is ocurred in RequestSpecificationImp#partiallyApplyPathParams, in the while() loop.
v5.1.1

Need to exit the "while" loop if indexOfEndBracket < 0

PS> I know that path in my example contains forbidden character but it should not cause endless loop. Actually we can get URL from any sources. Currently RestAssures properly encode all forbided characters in path: ", }, etc
But fail with the "{"

[johanhaleby]

@kool79 I had to revert your pull request because it broke the test io.restassured.itest.java.PathParamITest#throwsIllegalArgumentExceptionWhenTooManyPathParametersAreUsed. Could you address this in your PR?