refactor: centralize vertx5.version property in parent pom

Define vertx5.version=5.0.7 in parent pom.xml and reference it from
httpclient-vertx-5, chaos-tests, and kubernetes-itests modules instead
of duplicating the version in each module.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: manusa

chaos-tests/pom.xml

@@ -184,7 +184,7 @@
       <profile>
         <id>httpclient-vertx-5</id>
         <properties>
-          <vertx.version>5.0.7</vertx.version>
+          <vertx.version>${vertx5.version}</vertx.version>
         </properties>
         <dependencies>
           <dependency>

httpclient-vertx-5/pom.xml

@@ -29,7 +29,7 @@
   <name>Fabric8 :: Kubernetes :: HttpClient :: Vert.x 5</name>
 
   <properties>
-    <vertx.version>5.0.7</vertx.version>
+    <vertx.version>${vertx5.version}</vertx.version>
     <osgi.require-capability>
       osgi.extender;
       filter:="(osgi.extender=osgi.serviceloader.registrar)",

kubernetes-itests/pom.xml

@@ -166,7 +166,7 @@
       -->
       <properties>
         <!-- Override parent vertx.version for this profile -->
-        <vertx.version>5.0.7</vertx.version>
+        <vertx.version>${vertx5.version}</vertx.version>
       </properties>
       <dependencyManagement>
         <dependencies>

pom.xml

@@ -96,6 +96,7 @@
     <maven-core.version>3.9.11</maven-core.version>
     <maven-plugin-annotations.version>3.15.1</maven-plugin-annotations.version>
     <vertx.version>4.5.24</vertx.version>
+    <vertx5.version>5.0.7</vertx5.version>
     <jandex.version>3.5.0</jandex.version>
     <snakeyaml.version>2.10</snakeyaml.version>
     <snakeyaml.bundle.version>2.4</snakeyaml.bundle.version> <!-- Transitive Jackson -->