Bug 513459 - [SysML 1.4] Move the java version to 1.8 

 - move Manifest.MF to Java 1.8
 - also update prefs and classpath  
 
Change-Id: I881bd19abbfee21d3fee43aa67fccb165fab15c0
Signed-off-by: Benoit Maggi <benoit.maggi@cea.fr>
diff --git a/diagram/org.eclipse.papyrus.sysml14.diagram.requirement/META-INF/MANIFEST.MF b/diagram/org.eclipse.papyrus.sysml14.diagram.requirement/META-INF/MANIFEST.MF
index 91cf2a2..2045af8 100644
--- a/diagram/org.eclipse.papyrus.sysml14.diagram.requirement/META-INF/MANIFEST.MF
+++ b/diagram/org.eclipse.papyrus.sysml14.diagram.requirement/META-INF/MANIFEST.MF
@@ -12,6 +12,6 @@
  org.eclipse.papyrus.infra.viewpoints.policy;bundle-version="[1.1.0,2.0.0)",
  org.eclipse.papyrus.sysml14.viewpoint;bundle-version="0.9.1",
  org.eclipse.papyrus.sysml14.diagram.common;bundle-version="0.9.1"
-Bundle-RequiredExecutionEnvironment: JavaSE-1.7
+Bundle-RequiredExecutionEnvironment: JavaSE-1.8
 Bundle-ActivationPolicy: lazy
 Bundle-Vendor: %Bundle-Vendor