Reintroduce avro wildcard types in schema registry sample

See this issue in Spring Cloud Function: https://github.com/spring-cloud/spring-cloud-function/issues/611

schema-registry-samples/schema-registry-vanilla-kafka-binder/schema-registry-vanilla-producer1-kafka/pom.xml

@@ -34,6 +34,11 @@
 
 
     <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-function-context</artifactId>
+            <version>3.0.12.BUILD-SNAPSHOT</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-stream-binder-kafka</artifactId>

schema-registry-samples/schema-registry-vanilla-kafka-binder/schema-registry-vanilla-producer1-kafka/src/main/resources/application.yml

@@ -3,7 +3,7 @@ spring:
     stream:
       bindings:
         supplier-out-0:
-          contentType: application/+avro
+          contentType: application/*+avro
           destination: sensor-topic
       schema-registry-client:
         endpoint: http://localhost:8990

schema-registry-samples/schema-registry-vanilla-kafka-binder/schema-registry-vanilla-producer2-kafka/pom.xml

@@ -34,6 +34,11 @@
 
 
     <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-function-context</artifactId>
+            <version>3.0.12.BUILD-SNAPSHOT</version>
+        </dependency>
         <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-stream-binder-kafka</artifactId>
@@ -47,6 +52,10 @@
             <artifactId>avro</artifactId>
             <version>${avro.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
     </dependencies>
 
     <build>

schema-registry-samples/schema-registry-vanilla-kafka-binder/schema-registry-vanilla-producer2-kafka/src/main/resources/application.yml

@@ -3,7 +3,7 @@ spring:
     stream:
       bindings:
         supplier-out-0:
-          contentType: application/+avro
+          contentType: application/*+avro
           destination: sensor-topic
       schema-registry-client:
         endpoint: http://localhost:8990