feat: use java 17 as baseline

Signed-off-by: Attila Mészáros <[email protected]>

Author: csviri

Diff for: bootstrapper-maven-plugin/src/main/resources/templates/pom.xml

@@ -11,7 +11,7 @@
     <packaging>jar</packaging>
 
     <properties>
-        <java.version>11</java.version>
+        <java.version>17</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <josdk.version>{{josdkVersion}}</josdk.version>

Diff for: pom.xml

@@ -36,7 +36,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <java.version>11</java.version>
+        <java.version>17</java.version>
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <sonar.organization>java-operator-sdk</sonar.organization>