Added missing requirement to org.eclipse.equinox.launcher in test bundle

Launching org.eclipse.pde.junit.runtime.tests.JUnitRuntimeTests from Eclipse results in the following exception:

org.eclipse.core.runtime.CoreException: Launching failed. Bootstrap code cannot be found.

Adding org.eclipse.equinox.launcher to the required bundles of org.eclipse.pde.junit.runtime.tests avoids this error.

Fixes: #2024

Author: trancexpress

ui/org.eclipse.pde.junit.runtime.tests/META-INF/MANIFEST.MF

@@ -17,6 +17,7 @@ Require-Bundle: org.eclipse.core.runtime;bundle-version="3.29.0",
  org.eclipse.debug.ui;bundle-version="3.14.200",
  org.eclipse.ui;bundle-version="3.114.0",
  org.eclipse.pde.ui.tests;bundle-version="3.11.500",
+ org.eclipse.equinox.launcher;bundle-version="1.7.100",
  org.eclipse.jdt.junit4.runtime;bundle-version="[1.3.0,2.0.0)",
  org.eclipse.jdt.junit5.runtime;bundle-version="[1.1.0,2.0.0)",
  org.eclipse.pde.junit.runtime;bundle-version="[3.8.0,4.0.0)"