fix kotlin-spring declarative http interface

Author: Picazsoo

modules/openapi-generator/src/main/resources/kotlin-spring/libraries/spring-declarative-http-interface/apiInterface.mustache

@@ -6,6 +6,9 @@ package {{package}}
 
 {{#imports}}import {{import}}
 {{/imports}}
+{{#useRequestMappingOnInterface}}
+import {{#apiPackage}}{{.}}.{{/apiPackage}}{{classname}}.Companion.BASE_PATH
+{{/useRequestMappingOnInterface}}
 
 {{#swagger2AnnotationLibrary}}
 import io.swagger.v3.oas.annotations.*
@@ -48,7 +51,7 @@ import kotlin.collections.List
 import kotlin.collections.Map
 
 {{#useRequestMappingOnInterface}}
-@HttpExchange("\${api.base-path:{{contextPath}}}")
+@HttpExchange(BASE_PATH)
 {{/useRequestMappingOnInterface}}
 {{#useBeanValidation}}
 @Validated
@@ -74,9 +77,7 @@ interface {{classname}} {
 {{/operation}}
     companion object {
         //for your own safety never directly reuse these path definitions in tests
-    {{#useRequestMappingOnInterface}}
         const val BASE_PATH: String = "{{=<% %>=}}<%contextPath%><%={{ }}=%>"
-    {{/useRequestMappingOnInterface}}
     {{#operation}}
         const val PATH_{{#lambda.uppercase}}{{#lambda.snakecase}}{{{operationId}}}{{/lambda.snakecase}}{{/lambda.uppercase}}: String = "{{{path}}}"
     {{/operation}}