explicitely added BIRT min version number

org.eclipse.stem/analysis/org.eclipse.stem.util.analysis/META-INF/MANIFEST.MF

diff --git a/org.eclipse.stem/analysis/org.eclipse.stem.util.analysis/META-INF/MANIFEST.MF b/org.eclipse.stem/analysis/org.eclipse.stem.util.analysis/META-INF/MANIFEST.MF
index 3abf469..c16315c 100644
--- a/org.eclipse.stem/analysis/org.eclipse.stem.util.analysis/META-INF/MANIFEST.MF
+++ b/org.eclipse.stem/analysis/org.eclipse.stem.util.analysis/META-INF/MANIFEST.MF
@@ -6,8 +6,8 @@
 Bundle-Activator: org.eclipse.stem.util.analysis.Activator
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
-Require-Bundle: org.eclipse.birt.chart.engine;visibility:=reexport,
- org.eclipse.birt.core.ui,
+Require-Bundle: org.eclipse.birt.chart.engine;bundle-version="4.7.0";visibility:=reexport,
+ org.eclipse.birt.core.ui;bundle-version="4.7.0",
  org.eclipse.stem.ui,
  org.eclipse.stem.definitions,
  org.eclipse.stem.geography,