fix breaking examples (#5024)

* fix examples?springboot with no kustomization.yaml

* fix examples/loadHttp with legacy patch syntax

examples/springboot/base/application.properties

@@ -0,0 +1,5 @@
+app.name=Staging Kinflate Demo
+spring.jpa.hibernate.ddl-auto=update
+spring.datasource.url=jdbc:mysql://<production_db_ip>:3306/db_example
+spring.datasource.username=root
+spring.datasource.password=admin

examples/springboot/base/kustomization.yaml

@@ -0,0 +1,8 @@
+resources:
+- deployment.yaml
+- service.yaml
+configMapGenerator:
+- name: demo-configmap
+  # behavior: merge
+  files:
+    - application.properties