YETUS-1238. Add code to test gpg signing in initial-patches (#327)

Signed-off-by: Nick Dimiduk <[email protected]>

release/initial-patches.sh

@@ -145,12 +145,24 @@ update_version() {
   git add "${BASEDIR}/.mvn/maven.config"
 }
 
+test_gpg_signing() {
+  declare binary
+  echo "**** testing gpg signing"
+  binary=$(git config gpg.program)
+  if ! echo "test" | "${binary}" -o /dev/null -as -; then
+    exit 1
+  fi
+
+}
+
 option_parse "$@"
 
 check_basedir_repo
 
 trap cleanup INT QUIT TRAP ABRT BUS SEGV TERM ERR
 
+test_gpg_signing
+
 set -x
 
 git clean -xdf