Corrected file extension of run-test-docker file by adding .md

Change-Id: I305ecc2146be3d4fd240292b7dd075aab34ce4b0
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/run-test-docker b/run-test-docker.md
similarity index 100%
rename from run-test-docker
rename to run-test-docker.md