Fix build issues after upgrade (#977)

* Git purge 1.8 Java.

* Fixed build issue, maybe a partition tests fails.

build/org.eclipse.elk.targetplatform/org.eclipse.elk.targetplatform.target

@@ -7,15 +7,12 @@
       <unit id="org.eclipse.gmf.runtime.sdk.feature.group" version="0.0.0"/>
       <unit id="org.eclipse.lsp4j.sdk.feature.group" version="0.0.0"/>
       <unit id="org.eclipse.xtext.sdk.feature.group" version="0.0.0"/>
-      <repository location="http://download.eclipse.org/releases/2022-09"/>
-    </location>
-    <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
-      <unit id="com.google.gson" version="0.0.0"/>
       <unit id="org.eclipse.sdk.feature.group" version="0.0.0"/>
-      <repository location="https://download.eclipse.org/eclipse/updates/4.25/R-4.25-202208311800/"/>
+      <repository location="http://download.eclipse.org/releases/2022-09"/>
     </location>
     <location includeAllPlatforms="false" includeConfigurePhase="true" includeMode="planner" includeSource="true" type="InstallableUnit">
       <unit id="org.hamcrest.library" version="0.0.0"/>
+      <unit id="com.google.gson" version="0.0.0"/>
       <repository location="https://download.eclipse.org/tools/orbit/downloads/drops/R20220830213456/repository/"/>
     </location>
   </locations>

plugins/org.eclipse.elk.core.service/META-INF/MANIFEST.MF

@@ -7,12 +7,13 @@ Bundle-Version: 0.9.0.qualifier
 Bundle-Vendor: Eclipse Modeling Project
 Require-Bundle: com.google.guava,
  com.google.inject;bundle-version="3.0.0";visibility:=reexport,
- org.eclipse.core.runtime,
+ org.eclipse.core.runtime;bundle-version=3.26.0,
  org.eclipse.jface,
- org.eclipse.ui.workbench;bundle-version="3.105.0",
+ org.eclipse.ui.workbench,
  org.eclipse.emf.edit;bundle-version="2.5.0",
  org.eclipse.elk.graph,
- org.eclipse.elk.core;visibility:=reexport
+ org.eclipse.elk.core;visibility:=reexport,
+ org.eclipse.e4.ui.css.core;bundle-version="0.13.300"
 Eclipse-RegisterBuddy: org.eclipse.elk.core
 Bundle-RequiredExecutionEnvironment: JavaSE-11
 Export-Package: org.eclipse.elk.core.service,

plugins/org.eclipse.elk.core.service/pom.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-  Copyright (c) 2016 Kiel University and others.
+  Copyright (c) 2023 Kiel University and others.
   
   This program and the accompanying materials are made available under the
   terms of the Eclipse Public License 2.0 which is available at
@@ -38,12 +38,17 @@
     <dependency>
       <groupId>org.eclipse.platform</groupId>
       <artifactId>org.eclipse.core.runtime</artifactId>
-      <version>3.13.0</version>
+      <version>3.26.0</version>
+    </dependency>
+    <dependency>
+      <groupId>org.eclipse.platform</groupId>
+      <artifactId>org.eclipse.e4.ui.css.core</artifactId>
+      <version>0.13.300</version>
     </dependency>
     <dependency>
       <groupId>org.eclipse.platform</groupId>
       <artifactId>org.eclipse.ui.workbench</artifactId>
-      <version>3.110.0</version>
+      <version>3.126.0</version>
       <exclusions>
         <!-- exclude org.eclipse.swt here, as that in turn depends on "org.eclipse.platform:org.eclipse.swt.${osgi.platform}";
                that construction is prone to result in build troubles. -->