fix: Replace CAPI v2 with v3 (#597)

The CAPI v2 is deprecated and will be deactivated in the cf-deployment.
Therefore an update is needed to use the newer CAPI v3.

Author: chombium

src/internal/auth/capi_client.go

@@ -111,7 +111,7 @@ func (c *CAPIClient) HasApp(sourceID, authToken string) bool {
 }
 
 func (c *CAPIClient) HasService(sourceID, authToken string) bool {
-	req, err := http.NewRequest(http.MethodGet, c.addr+"/v2/service_instances/"+sourceID, nil)
+	req, err := http.NewRequest(http.MethodGet, c.addr+"/v3/service_instances/"+sourceID, nil)
 	if err != nil {
 		c.log.Printf("failed to build authorize log access request: %s", err)
 		return false

src/internal/auth/capi_client_test.go

@@ -147,7 +147,7 @@ var _ = Describe("CAPIClient", func() {
 			Expect(tc.capiClient.requests).To(HaveLen(1))
 			serviceReq := tc.capiClient.requests[0]
 			Expect(serviceReq.Method).To(Equal(http.MethodGet))
-			Expect(serviceReq.URL.String()).To(Equal("http://internal.capi.com/v2/service_instances/some-source"))
+			Expect(serviceReq.URL.String()).To(Equal("http://internal.capi.com/v3/service_instances/some-source"))
 			Expect(serviceReq.Header.Get("Authorization")).To(Equal("some-token"))
 		})
 
@@ -162,7 +162,7 @@ var _ = Describe("CAPIClient", func() {
 			Expect(tc.capiClient.requests).To(HaveLen(1))
 			serviceReq := tc.capiClient.requests[0]
 			Expect(serviceReq.Method).To(Equal(http.MethodGet))
-			Expect(serviceReq.URL.String()).To(Equal("http://internal.capi.com/v2/service_instances/some-source"))
+			Expect(serviceReq.URL.String()).To(Equal("http://internal.capi.com/v3/service_instances/some-source"))
 			Expect(serviceReq.Header.Get("Authorization")).To(Equal("some-token"))
 		})