Split jdt ls extension into two parts

One pugin to contain the bulk of the code, which is independent of jdt.ls, lsp4e and lsp4j.
Second plugin to contain the jdt.ls specific DelegateCommandHandler implementation.

This should allow us to somehow re-use the bulk of the code in STS4 eclipse, i.e. when
we have access to JDT from eclipse directly, and there is no jdt.ls process around.

vscode-extensions/vscode-spring-boot/build.sh

@@ -4,9 +4,9 @@ set -e -x
 workdir=$(pwd)
 
 # Build jdt.ls
-cd ${HOME}/git/eclipse.jdt.ls
-jdt_ls_repo=$(pwd)
-./mvnw -Pserver-distro -Pupdate-site clean package
+# cd ${HOME}/git/eclipse.jdt.ls
+# jdt_ls_repo=$(pwd)
+# ./mvnw -Pserver-distro -Pupdate-site clean package
 
 # Section below disabled for now. So we can work on the 'fallbacks' with missing or old vscode-java
 # Build vscode-java
@@ -21,10 +21,12 @@ jdt_ls_repo=$(pwd)
 #code --uninstall-extension redhat.java || echo "Not installed redhat.java"
 #code --install-extension *.vsix
 
+code --install-extension redhat.java
+
 # Build spring boot ls
 cd $workdir
 npm install
 rm -fr *.vsix
 npm run vsce-package
-code --uninstall-extension Pivotal.vscode-spring-boot || echo "Not installed Pivotal.vscode-spring-boot"
+rm -fr ${home}/.vscode/extensions/Pivotal.vscode-spring-boot-*
 code --install-extension *.vsix

vscode-extensions/vscode-spring-boot/package.json

@@ -32,6 +32,7 @@
   ],
   "contributes": {
     "javaExtensions": [
+      "./jars/jdt-ls-commons.jar",
       "./jars/jdt-ls-extension.jar"
     ],
     "languages": [
@@ -93,7 +94,7 @@
     "vsce-package": "vsce package"
   },
   "dependencies": {
-    "@pivotal-tools/commons-vscode": "^0.2.0",
+    "@pivotal-tools/commons-vscode": "file:../commons-vscode/pivotal-tools-commons-vscode-0.2.1.tgz",
     "vscode-languageclient": "^4.0.0"
   },
   "devDependencies": {

vscode-extensions/vscode-spring-boot/scripts/preinstall.sh

@@ -16,10 +16,10 @@ rm -fr ${workdir}/jars
 mkdir -p ${workdir}/jars
 
 # Use maven to build jdt ls extension
-cd ../../headless-services/org.springframework.tooling.jdt.ls.extension
-../mvnw \
-    clean package
-cp target/*.jar ${workdir}/jars/jdt-ls-extension.jar
+cd ../../headless-services/jdt-ls-extension
+../mvnw clean package
+cp org.springframework.tooling.jdt.ls.extension/target/*.jar ${workdir}/jars/jdt-ls-extension.jar
+cp org.springframework.tooling.jdt.ls.commons/target/*.jar ${workdir}/jars/jdt-ls-commons.jar
 
 # Use maven to build fat jar of the language server
 cd ../../headless-services/spring-boot-language-server