use updated test contextExtractor

Author: stantonk

mcp/src/test/java/io/modelcontextprotocol/server/HttpServletSseIntegrationTests.java

@@ -40,7 +40,7 @@ public void before() {
 		// Create and configure the transport provider
 		mcpServerTransportProvider = HttpServletSseServerTransportProvider.builder()
 			.objectMapper(new ObjectMapper())
-			.contextExtractor(extractor)
+			.contextExtractor(TEST_CONTEXT_EXTRACTOR)
 			.messageEndpoint(CUSTOM_MESSAGE_ENDPOINT)
 			.sseEndpoint(CUSTOM_SSE_ENDPOINT)
 			.build();

mcp/src/test/java/io/modelcontextprotocol/server/HttpServletStreamableIntegrationTests.java

@@ -38,7 +38,7 @@ public void before() {
 		// Create and configure the transport provider
 		mcpServerTransportProvider = HttpServletStreamableServerTransportProvider.builder()
 			.objectMapper(new ObjectMapper())
-			.contextExtractor(extractor)
+			.contextExtractor(TEST_CONTEXT_EXTRACTOR)
 			.mcpEndpoint(MESSAGE_ENDPOINT)
 			.keepAliveInterval(Duration.ofSeconds(1))
 			.build();