KEYCLOAK-8494 Use c3p0 connection pool in testsuite

pom.xml

@@ -406,6 +406,12 @@
                 <artifactId>hibernate-entitymanager</artifactId>
                 <version>${hibernate.entitymanager.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.hibernate</groupId>
+                <artifactId>hibernate-c3p0</artifactId>
+                <version>${hibernate.entitymanager.version}</version>
+                <scope>test</scope>
+            </dependency>
             <dependency>
                 <groupId>org.freemarker</groupId>
                 <artifactId>freemarker</artifactId>

testsuite/integration-arquillian/tests/base/pom.xml

@@ -142,6 +142,10 @@
             <type>war</type>
             <version>${project.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.hibernate</groupId>
+            <artifactId>hibernate-c3p0</artifactId>
+        </dependency>
     </dependencies>
     
     <build>
@@ -185,6 +189,9 @@
                         <exclude>${exclude.cors.tests}</exclude>
                         <exclude>${exclude.HoK}</exclude>
                     </excludes>
+                    <systemPropertyVariables>
+                        <com.mchange.v2.c3p0.VMID>testsuiteVmId</com.mchange.v2.c3p0.VMID>
+                    </systemPropertyVariables>
                 </configuration>
             </plugin>
         

testsuite/integration-arquillian/tests/base/src/test/resources/c3p0.properties

@@ -0,0 +1,5 @@
+c3p0.minPoolSize=3
+c3p0.maxPoolSize=30
+c3p0.forceIgnoreUnresolvedTransactions=true
+c3p0.unreturnedConnectionTimeout=60
+c3p0.debugUnreturnedConnectionStackTraces=true