Bug 582758: Disable deriveHeaderFromSource for tycho-packaging-plugin

This makes sure that RequiredExecutionEnvironment is set in each
MANIFEST.MF of each packaged plug-in jar file.

Having RequiredExecutionEnvironment set in the MANIFEST.MF will avoid
API tool's warnings in the Eclipse IDE about changed execution
environment when using an update site as baseline.

[Fixed] Disable deriveHeaderFromSource for tycho-packaging-plugin

Change-Id: I9b5ac1a9dd71345cafab8af7db61e8ec30804c8d
Signed-off-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass/org.eclipse.tracecompass/+/205853
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Patrick Tasse <patrick.tasse@gmail.com>
Reviewed-by: Patrick Tasse <patrick.tasse@gmail.com>

pom.xml

diff --git a/pom.xml b/pom.xml
index 3635b7d..06281ad 100644
--- a/pom.xml
+++ b/pom.xml
@@ -560,6 +560,7 @@
             <sourceReferences>
               <generate>true</generate>
             </sourceReferences>
+            <deriveHeaderFromSource>false</deriveHeaderFromSource>
           </configuration>
           <dependencies>
             <dependency>