ci-dockerfiles-deployment: Dump docker version.

Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
Change-Id: Ie0e08ad359b0feb7c650449176893da9ab7298c1
diff --git a/ci-dockerfiles-deployment/builders.sh b/ci-dockerfiles-deployment/builders.sh
index 3e67839..e9f0fdd 100644
--- a/ci-dockerfiles-deployment/builders.sh
+++ b/ci-dockerfiles-deployment/builders.sh
@@ -2,6 +2,8 @@
 
 set -ex
 
+docker --version
+
 echo ""
 echo "########################################################################"
 echo "    Gerrit Environment"