Revert "Fix default EXTRA_FORMULAS logic"

This reverts commit 28e6757cee0a4ead12e008e2e3247616fd6795a3.

Change-Id: I0f19c69c6238edeec543e7534d1c43bf4c1732d8
diff --git a/src/com/mirantis/mk/SaltModelTesting.groovy b/src/com/mirantis/mk/SaltModelTesting.groovy
index 261990c..6d7b9ad 100644
--- a/src/com/mirantis/mk/SaltModelTesting.groovy
+++ b/src/com/mirantis/mk/SaltModelTesting.groovy
@@ -34,7 +34,6 @@
     if (!extraFormulas.contains('*') && formulasSource == 'pkg') {
         common.warningMsg("You have passed deprecated variable:extraFormulas=${extraFormulas}. " +
             "\n It would be ignored, and all formulas would be installed anyway")
-        extraFormulas = '*'
     }
     if (!dockerContainerName) {
         dockerContainerName = 'setupAndTestNode' + UUID.randomUUID().toString()