revert: drop H2 + in-test DB override in smoke test

Per product direction, the e2e/sample path MUST exercise real Postgres
+ Flyway so Keploy is forced to correctly capture the full wire-protocol
footprint — including the Flyway bootstrap/migration queries. Swapping
the datasource for H2 at test time would hide exactly the behaviour the
sample is meant to regress.

Restores the Customer360ApplicationTests to its pre-review shape and
drops the H2 test dependency. The test assumes a live Postgres on
localhost:5432 (docker-compose.yml brings it up); added a Javadoc note
so future readers don't re-H2 it.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: slayerjain

sap-demo-java/pom.xml

@@ -125,13 +125,6 @@
             <artifactId>spring-boot-starter-test</artifactId>
             <scope>test</scope>
         </dependency>
-        <!-- H2 replaces Postgres at test time (@AutoConfigureTestDatabase) so
-             the context-load smoke test can run without a live DB. -->
-        <dependency>
-            <groupId>com.h2database</groupId>
-            <artifactId>h2</artifactId>
-            <scope>test</scope>
-        </dependency>
     </dependencies>
 
     <build>

sap-demo-java/src/test/java/com/tricentisdemo/sap/customer360/Customer360ApplicationTests.java

@@ -1,31 +1,29 @@
 package com.tricentisdemo.sap.customer360;
 
 import org.junit.jupiter.api.Test;
-import org.springframework.boot.test.autoconfigure.jdbc.AutoConfigureTestDatabase;
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.test.context.TestPropertySource;
 
 /**
  * Minimal context-load smoke test. Verifies the Spring wiring is correct —
  * RestTemplate, interceptors, executor, Resilience4j decorators all bind.
  *
- * <p>{@link AutoConfigureTestDatabase} replaces the configured Postgres
- * with an in-memory H2 at test time so this test can run in environments
- * without a live DB. Flyway is disabled for the same reason (migrations
- * are Postgres-specific); Hibernate creates the schema from entities.
+ * <p><b>This test expects a live Postgres instance on localhost:5432</b>
+ * (see docker-compose.yml). That is deliberate: the sample exists to
+ * validate that Keploy correctly captures real Postgres traffic —
+ * including the Flyway bootstrap queries — so swapping the datasource
+ * for H2 would hide exactly the wire-protocol behaviour we regress.
+ * Bring the compose stack up (`docker compose up -d postgres`) before
+ * running tests, or run via the CI pipeline where Postgres is provisioned.
  *
  * <p>The full integration test suite is intentionally out of scope for
  * this reference service: the regression layer is provided by Keploy
- * mocks recorded from real SAP traffic. That is the whole point of the
- * demo.
+ * mocks recorded from real SAP traffic.
  */
 @SpringBootTest
-@AutoConfigureTestDatabase(replace = AutoConfigureTestDatabase.Replace.ANY)
 @TestPropertySource(properties = {
     "sap.api.base-url=https://example.invalid",
-    "sap.api.key=test-key",
-    "spring.flyway.enabled=false",
-    "spring.jpa.hibernate.ddl-auto=create-drop"
+    "sap.api.key=test-key"
 })
 class Customer360ApplicationTests {