DAOS-623 ci: Return '' if no pragma was present (#327)

And no default value was set.
Compare pragma names case insensitively.

Signed-off-by: Brian J. Murrell <[email protected]>

Author: brianjmurrell

vars/commitPragma.groovy

@@ -31,12 +31,12 @@ String call(String name, String def_val = null) {
             [(pair.first()): pair.last()]
         }
 
-        if (pragmas[name]) {
-            return pragmas[name]
+        if (pragmas[name.toLowerCase()]) {
+            return pragmas[name.toLowerCase()]
         } else if (def_val) {
             return def_val
         }
-    } else {
-        return commitPragmaTrusted(name, def_val)
+        return ''
     }
+    return commitPragmaTrusted(name, def_val)
 }