Use TestBench version 5.0.0.beta5 (#8557)

bom/pom.xml

 
     <properties>
         <vaadin.spring.version>2.0-SNAPSHOT</vaadin.spring.version>
-        <vaadin.testbench.version>5.0.0.alpha2</vaadin.testbench.version>
+        <vaadin.testbench.version>5.0.0.beta5</vaadin.testbench.version>
         <vaadin.cdi.version>2.0-SNAPSHOT</vaadin.cdi.version>
     </properties>
 

pom.xml

             <dependency>
                 <groupId>com.vaadin</groupId>
                 <artifactId>vaadin-testbench</artifactId>
-                <version>5.0.0.alpha2</version>
+                <version>5.0.0.beta5</version>
             </dependency>
             <dependency>
                 <groupId>org.eclipse.jetty</groupId>

testbench-api/pom.xml

     <description>Vaadin Framework Element API for TestBench</description>
 
     <properties>
-        <testbench.core.version>5.0.0.alpha2</testbench.core.version>
+        <testbench.core.version>5.0.0.beta5</testbench.core.version>
     </properties>
 
     <dependencies>