fix test resource_managed_certificate_test.go (#524)

* fix all custom certificate tests

* fix resource_managed_certificate_test.go

Author: dotanrazimpv

incapsula/resource_managed_certificate_test.go

@@ -48,11 +48,11 @@ func testAccSiteCertificateDestroy(s *terraform.State) error {
 func testAccSiteCertificateRequestConfig(t *testing.T) string {
 	res := fmt.Sprintf(`
 	
-   resource "imperva_site_v3" "%s" {
+   resource "incapsula_site_v3" "%s" {
 			name = "%s"
 	}
 	resource "%s" "%s" {
-    site_id = imperva_site_v3.%s.id
+    site_id = incapsula_site_v3.%s.id
     default_validation_method = "DNS"
 	}`,
 		siteV3ResourceNameForManagedCert, siteV3Name, siteCertificateResourceName, siteCertificateConfigName, siteV3ResourceNameForManagedCert,