fix

Author: xinsong-cui

runtime/protocol/http-client-engines/test-suite/build.gradle.kts

@@ -129,7 +129,7 @@ val testTasks = listOf("allTests", "jvmTest")
 tasks.jvmTest {
     // set test environment for proxy tests
     systemProperty("MITM_PROXY_SCRIPTS_ROOT", projectDir.resolve("proxy-scripts").absolutePath)
-    systemProperty("SSL_CONFIG_PATH", testServerService.get().parameters.sslConfigPath)
+    systemProperty("SSL_CONFIG_PATH", testServerService.get().parameters.sslConfigPath.get())
 
     val enableProxyTestsProp = "aws.test.http.enableProxyTests"
     val runningInCodeBuild = System.getenv().containsKey("CODEBUILD_BUILD_ID")