[Spring] Fix generated api ignore basePath (#10573)

* remove @RequestMapping from the apiController.mustache file and add it
to the api.mustache file

* move the defaultBasePath.mustache file in src/main/resources/JavaSpring
so that it commun with all Spring server-side libraries (spring-boot,
spring-mvc). The value of default context path is the value of
contextPath variable.

* added a unit test to verify it

* update the outputDir variable to samples/server/petstore/spring-stubs in
the  bin/configs/spring-stubs.yaml file because it generates Spring
server-side classes. And not on the client-side as the output directory
seemed to suggest.

* Results of "generate-samples.sh bin/configs/spring*" command

* Remove default value of url in @FeignClient

* resolve conflicts with origin/master

* merge remote/master into branch

* fix samples after a merge with master

* delete the directory samples/client/petstore/spring-stubs because it
moved to samples/openapi3/...

* add samples/client/petstore/spring-stubs just for the CI build (normally
it is unnecessary))

* delete 3 kotlin class files commited by error in
samples/server/petstore/kotlin-springboot and
samples/server/petstore/kotlin-springboot-reactive

* Update the unit test SpringCodegenTest.doAnnotateDatesOnModelParameters
because one more annotation is generated (@RequestMapping)

Co-authored-by: rpruvost <rpruvost@ITEM-S78402.emea.msad.sopra>
Co-authored-by: rpruvost <rpruvost@ITEM-S78402>
Co-authored-by: rpruvost <rpruvost>

samples/client/petstore/cpp-tiny/lib/service/AbstractService.h

@@ -0,0 +1,28 @@
+#ifndef TINY_CPP_CLIENT_ABSTRACTSERVICE_H_
+#define TINY_CPP_CLIENT_ABSTRACTSERVICE_H_
+
+#include "HTTPClient.h"
+#include "Response.h"
+namespace Tiny {
+
+/**
+*  Class
+* Generated with openapi::tiny-cpp-client
+*/
+class AbstractService {
+public:
+HTTPClient http;
+std::string basepath = "https://petstore3.swagger.io/api/v3"; // TODO: change to your url
+
+void begin(std::string url);
+
+// Go and comment out a certificate in root.cert, if you get an error here
+// Certificate from file
+const char* test_root_ca =
+#include "../../root.cert"
+;
+
+}; // end class
+}// namespace Tinyclient
+
+#endif /* TINY_CPP_CLIENT_ABSTRACTSERVICE_H_ */