Set Java version to plugin and filtered target folders in projects

plugins/org.yakindu.base.expressions/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.5
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.5
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.5

plugins/org.yakindu.base.expressions/META-INF/MANIFEST.MF

@@ -36,4 +36,3 @@ Export-Package: org.yakindu.base.expressions,
  org.yakindu.base.expressions.services,
  org.yakindu.base.expressions.validation
 Bundle-ClassPath: .
-