chore(test): update phpunit testcase with name attribute (GoogleCloudPlatform#1137)

Author: bshaffer

appengine/flexible/analytics/phpunit.xml.dist

@@ -19,7 +19,7 @@
         <env name="GA_TRACKING_ID" value="UA-78971600-1"/>
     </php>
     <testsuites>
-        <testsuite>
+        <testsuite name="App Engine Flex Memcache tests">
             <directory>test</directory>
         </testsuite>
     </testsuites>

appengine/flexible/cloudsql-mysql/phpunit.xml.dist

@@ -16,7 +16,7 @@
 -->
 <phpunit bootstrap="../../../testing/bootstrap.php" colors="true">
     <testsuites>
-        <testsuite>
+        <testsuite name="App Engine Flex CloudSQL MySQL tests">
             <directory>test</directory>
         </testsuite>
     </testsuites>

appengine/flexible/cloudsql-postgres/phpunit.xml.dist

@@ -16,7 +16,7 @@
 -->
 <phpunit bootstrap="../../../testing/bootstrap.php" colors="true">
     <testsuites>
-        <testsuite>
+        <testsuite name="App Engine Flex CloudSQl Postgres tests">
             <directory>test</directory>
         </testsuite>
     </testsuites>

appengine/flexible/datastore/phpunit.xml.dist

@@ -16,7 +16,7 @@
 -->
 <phpunit bootstrap="../../../testing/bootstrap.php" colors="true">
     <testsuites>
-        <testsuite>
+        <testsuite name="App Engine Flex Datastore tests">
             <directory>test</directory>
         </testsuite>
     </testsuites>

appengine/flexible/memcache/phpunit.xml.dist

@@ -16,7 +16,7 @@
 -->
 <phpunit bootstrap="../../../testing/bootstrap.php" colors="true">
     <testsuites>
-        <testsuite>
+        <testsuite name="App Engine Flex Memcache tests">
             <directory>test</directory>
         </testsuite>
     </testsuites>