chore: 병렬 테스트 제한 (MIKKI-216)

Author: swjoon

backend/build.gradle

@@ -86,7 +86,7 @@ dependencies {
     testImplementation 'com.navercorp.fixturemonkey:fixture-monkey-jakarta-validation:1.1.10'
 
     // Spring Security Test 라이브러리
-	testImplementation 'org.springframework.security:spring-security-test'
+    testImplementation 'org.springframework.security:spring-security-test'
 
     // 메일 라이브러리
     implementation 'org.springframework.boot:spring-boot-starter-mail'
@@ -109,6 +109,10 @@ sourceSets {
     main.java.srcDirs += [generated]
 }
 
+test {
+    maxParallelForks = 1
+}
+
 // gradle clean 시에 QClass 디렉토리 삭제
 clean {
     delete file(generated)