chore(spanner): INVALID_ARGUMENT error code to NOT_FOUND

Author: harshachinta

google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITTransactionManagerAsyncTest.java

@@ -161,14 +161,7 @@ public void testInvalidInsert() throws InterruptedException {
         } catch (ExecutionException e) {
           assertThat(e.getCause()).isInstanceOf(SpannerException.class);
           SpannerException se = (SpannerException) e.getCause();
-          if (env.getTestHelper()
-              .getOptions()
-              .getSessionPoolOptions()
-              .getUseMultiplexedSessionForRW()) {
-            assertThat(se.getErrorCode()).isEqualTo(ErrorCode.INVALID_ARGUMENT);
-          } else {
-            assertThat(se.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
-          }
+          assertThat(se.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
           // expected
           break;
         }

google-cloud-spanner/src/test/java/com/google/cloud/spanner/it/ITWriteTest.java

@@ -1043,14 +1043,7 @@ public void tableNotFound() {
               .build());
       fail("Expected exception");
     } catch (SpannerException ex) {
-      if (env.getTestHelper()
-          .getOptions()
-          .getSessionPoolOptions()
-          .getUseMultiplexedSessionForRW()) {
-        assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.INVALID_ARGUMENT);
-      } else {
-        assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
-      }
+      assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
     }
   }
 
@@ -1060,14 +1053,7 @@ public void columnNotFound() {
       write(baseInsert().set("ColumnThatDoesNotExist").to("V1").build());
       fail("Expected exception");
     } catch (SpannerException ex) {
-      if (env.getTestHelper()
-          .getOptions()
-          .getSessionPoolOptions()
-          .getUseMultiplexedSessionForRW()) {
-        assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.INVALID_ARGUMENT);
-      } else {
-        assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
-      }
+      assertThat(ex.getErrorCode()).isEqualTo(ErrorCode.NOT_FOUND);
     }
   }