fix compile to jdk 17+

Author: Picazsoo

.github/workflows/samples-kotlin-server-jdk17.yaml

@@ -8,6 +8,7 @@ on:
       - 'samples/server/petstore/kotlin-server-modelMutable/**'
       - 'samples/server/petstore/kotlin-springboot-*/**'
       - 'samples/server/petstore/kotlin-server-required-and-nullable-properties/**'
+      - 'samples/server/petstore/kotlin-spring-declarative*/**'
       # comment out due to gradle build failure
       # - samples/server/petstore/kotlin-spring-default/**
   pull_request:
@@ -17,6 +18,7 @@ on:
       - 'samples/server/petstore/kotlin-server-modelMutable/**'
       - 'samples/server/petstore/kotlin-springboot-*/**'
       - 'samples/server/petstore/kotlin-server-required-and-nullable-properties/**'
+      - 'samples/server/petstore/kotlin-spring-declarative*/**'
       # comment out due to gradle build failure
       # - samples/server/petstore/kotlin-spring-default/**
 
@@ -44,6 +46,10 @@ jobs:
           - samples/server/petstore/kotlin-server/ktor
           - samples/server/petstore/kotlin-server/ktor2
           - samples/server/petstore/kotlin-misk
+          - samples/server/petstore/kotlin-spring-declarative-interface
+          - samples/server/petstore/kotlin-spring-declarative-interface-reactive-coroutines
+          - samples/server/petstore/kotlin-spring-declarative-interface-reactive-reactor-wrapped
+          - samples/server/petstore/kotlin-spring-declarative-interface-wrapped
           # comment out due to gradle build failure
           # - samples/server/petstore/kotlin-spring-default/
     steps:

.github/workflows/samples-kotlin-server.yaml

@@ -39,10 +39,6 @@ jobs:
           - samples/server/petstore/kotlin-springboot-source-swagger2
           - samples/server/petstore/kotlin-springboot-springfox
           - samples/server/petstore/kotlin-springboot-x-kotlin-implements
-          - samples/server/petstore/kotlin-spring-declarative-interface
-          - samples/server/petstore/kotlin-spring-declarative-interface-reactive-coroutines
-          - samples/server/petstore/kotlin-spring-declarative-interface-reactive-reactor-wrapped
-          - samples/server/petstore/kotlin-spring-declarative-interface-wrapped
           - samples/server/petstore/kotlin-server/ktor
           - samples/server/petstore/kotlin-server/ktor2
           - samples/server/petstore/kotlin-server/jaxrs-spec