Add jitpack.yml to use OpenJDK 17 for JitPack build (#170)

* MsgService from eiffel-remrem-protocol 2.2.0 implemented

Author: z-sztrom

jitpack.yml

@@ -0,0 +1,5 @@
+jdk:
+  - openjdk17
+before_install:
+  - sdk install java 17.0.5-open
+  - sdk use java 17.0.5-open

pom.xml

@@ -11,6 +11,8 @@
     <packaging>jar</packaging>
     <properties>
         <eclipse.jgit.version>5.0.1.201806211838-r</eclipse.jgit.version>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
     </properties>
     <repositories>
         <repository>