Fix directpath tests

Author: sakthivelmanii

google-cloud-spanner/pom.xml

@@ -545,6 +545,31 @@
           </plugins>
       </build>
     </profile>
+    <profile>
+      <id>directpath-tests</id>
+      <activation>
+        <property>
+          <name>env.GOOGLE_SPANNER_ENABLE_DIRECT_ACCESS</name>
+          <value>true</value>
+        </property>
+      </activation>
+      <build>
+        <plugins>
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-surefire-plugin</artifactId>
+            <executions>
+              <execution>
+                <id>default-test</id>
+                <configuration>
+                  <excludedGroups>com.google.cloud.spanner.MockServerTest</excludedGroups>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
+        </plugins>
+      </build>
+    </profile>
     <profile>
       <id>spanner-directpath-it</id>
       <build>

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

@@ -0,0 +1,4 @@
+package com.google.cloud.spanner;
+
+public interface MockServerTest {
+}