Enable use of JUnit 4 with the jgit.test project

Some enablement was done earlier, but we need to add the org.junit package
and hamcrest to make it work.

junit.textui removed, probably a mistake at some time in the past.

Change-Id: I6922a2f40eb0c077a8ade5ed073ecf0e90425544

org.eclipse.jgit.test/META-INF/MANIFEST.MF

@@ -8,7 +8,6 @@ Bundle-Vendor: %provider_name
 Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Import-Package: junit.framework;version="[4.0.0,5.0.0)",
- junit.textui;version="[3.8.2,4.0.0)",
  org.eclipse.jgit;version="[0.11.0,0.12.0)",
  org.eclipse.jgit.api;version="[0.11.0,0.12.0)",
  org.eclipse.jgit.api.errors;version="[0.11.0,0.12.0)",
@@ -38,5 +37,7 @@ Import-Package: junit.framework;version="[4.0.0,5.0.0)",
  org.eclipse.jgit.treewalk;version="[0.11.0,0.12.0)",
  org.eclipse.jgit.treewalk.filter;version="[0.11.0,0.12.0)",
  org.eclipse.jgit.util;version="[0.11.0,0.12.0)",
- org.eclipse.jgit.util.io;version="[0.11.0,0.12.0)"
-Require-Bundle: com.jcraft.jsch;bundle-version="[0.1.37,0.2.0)"
+ org.eclipse.jgit.util.io;version="[0.11.0,0.12.0)",
+ org.junit;version="[4.0.0,5.0.0)"
+Require-Bundle: com.jcraft.jsch;bundle-version="[0.1.37,0.2.0)",
+ org.hamcrest;bundle-version="[1.1.0,2.0.0)"