Stop using simrel 2021-09 repo in tests

It's archived and frequent usage leads to broken builds with:
"org.eclipse.equinox.p2.core.ProvisionException: No repository found at
https://download.eclipse.org/technology/epp/packages/2021-09/..."
as archives are not mirrored and this leads to heavy load (and DoS) of
archive.eclipse.org.

tycho-its/projects/compiler.fragments/META-INF/MANIFEST.MF

@@ -4,7 +4,7 @@ Bundle-Name: JGit with Fragment
 Bundle-SymbolicName: compiler.fragments
 Bundle-Version: 1.0.0
 Require-Bundle: org.eclipse.core.runtime,
- org.eclipse.jgit;bundle-version="5.13.0",
+ org.eclipse.jgit;bundle-version="7.1.0",
  com.jcraft.jsch;bundle-version="0.1.55"
 Bundle-RequiredExecutionEnvironment: JavaSE-17
 Bundle-ActivationPolicy: lazy

tycho-its/projects/compiler.fragments/jgit.target

@@ -3,14 +3,14 @@
 <target name="jgit">
 <locations>
 <location includeAllPlatforms="false" includeConfigurePhase="false" includeMode="planner" includeSource="true" type="InstallableUnit">
-			<repository location="https://download.eclipse.org/releases/2021-09/"/>
-			<unit id="org.eclipse.sdk.feature.group" version="4.21.0.v20210906-0842"/>
-			<unit id="org.eclipse.jgit.feature.group" version="5.13.0.202109080827-r"/>
-			<unit id="org.eclipse.jgit.gpg.bc.feature.group" version="5.13.0.202109080827-r"/>
-			<unit id="org.eclipse.jgit.http.apache.feature.group" version="5.13.0.202109080827-r"/>
-			<unit id="org.eclipse.jgit.lfs.feature.group" version="5.13.0.202109080827-r"/>
-			<unit id="org.eclipse.jgit.ssh.apache.feature.group" version="5.13.0.202109080827-r"/>
-			<unit id="org.eclipse.jgit.ssh.jsch.feature.group" version="5.13.0.202109080827-r"/>
+			<repository location="https://download.eclipse.org/releases/2024-12/"/>
+			<unit id="org.eclipse.sdk.feature.group" version="4.34.0.v20241120-1800"/>
+			<unit id="org.eclipse.jgit.feature.group" version="7.1.0.202411261347-r"/>
+			<unit id="org.eclipse.jgit.gpg.bc.feature.group" version="7.1.0.202411261347-r"/>
+			<unit id="org.eclipse.jgit.http.apache.feature.group" version="7.1.0.202411261347-r"/>
+			<unit id="org.eclipse.jgit.lfs.feature.group" version="7.1.0.202411261347-r"/>
+			<unit id="org.eclipse.jgit.ssh.apache.feature.group" version="7.1.0.202411261347-r"/>
+			<unit id="org.eclipse.jgit.ssh.jsch.feature.group" version="7.1.0.202411261347-r"/>
 		</location>
 </locations>>
 </target>

tycho-its/projects/compiler.fragments/pom.xml

@@ -9,7 +9,7 @@
 	<packaging>eclipse-plugin</packaging>
 
 	<properties>
-		<tycho-version>3.0.0-SNAPSHOT</tycho-version>
+		<tycho-version>4.0.10</tycho-version>
 	</properties>
 
 	<build>

tycho-its/projects/compiler.fragments/src/compiler/fragments/TestMe.java

@@ -20,8 +20,8 @@
 import org.eclipse.jgit.api.errors.GitAPIException;
 import org.eclipse.jgit.api.errors.InvalidRemoteException;
 import org.eclipse.jgit.api.errors.TransportException;
-import org.eclipse.jgit.transport.JschConfigSessionFactory;
-import org.eclipse.jgit.transport.OpenSshConfig;
+import org.eclipse.jgit.transport.ssh.jsch.JschConfigSessionFactory;
+import org.eclipse.jgit.transport.ssh.jsch.OpenSshConfig;
 import org.eclipse.jgit.transport.SshSessionFactory;
 import org.eclipse.jgit.transport.SshTransport;
 import org.eclipse.jgit.transport.Transport;