chore(spanner): verify env for skipping tests

Author: harshachinta

google-cloud-spanner/src/test/java/com/google/cloud/spanner/SessionPoolOptionsTest.java

@@ -284,11 +284,6 @@ public void testRandomizePositionQPSThreshold() {
   @Test
   public void testUseMultiplexedSession() {
     // skip these tests since this configuration can have dual behaviour in different test-runners
-    System.out.println(SessionPoolOptions.newBuilder().build().getUseMultiplexedSession());
-    System.out.println(SessionPoolOptions.newBuilder().build().getUseMultiplexedSessionForRW());
-    System.out.println(System.getenv("GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS"));
-    System.out.println(System.getenv("GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS_FOR_RW"));
-    System.out.println("Running test on Java version: " + System.getProperty("java.version"));
     assumeFalse(SessionPoolOptions.newBuilder().build().getUseMultiplexedSession());
     assertEquals(false, SessionPoolOptions.newBuilder().build().getUseMultiplexedSession());
     assertEquals(
@@ -309,11 +304,8 @@ public void testUseMultiplexedSession() {
   @Test
   public void testUseMultiplexedSessionForRW() {
     // skip these tests since this configuration can have dual behaviour in different test-runners
-    System.out.println(SessionPoolOptions.newBuilder().build().getUseMultiplexedSession());
-    System.out.println(SessionPoolOptions.newBuilder().build().getUseMultiplexedSessionForRW());
-    System.out.println(System.getenv("GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS"));
-    System.out.println(System.getenv("GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS_FOR_RW"));
-    System.out.println("Running test on Java version: " + System.getProperty("java.version"));
+    assumeFalse(
+        Boolean.parseBoolean(System.getenv("GOOGLE_CLOUD_SPANNER_MULTIPLEXED_SESSIONS_FOR_RW")));
     assumeFalse(SessionPoolOptions.newBuilder().build().getUseMultiplexedSession());
     assumeFalse(SessionPoolOptions.newBuilder().build().getUseMultiplexedSessionForRW());