yanglint BUGFIX debug tests

Now they shouldn't be skipping anymore.
diff --git a/tools/lint/tests/interactive/debug.test b/tools/lint/tests/interactive/debug.test
index d04c0f0..8a64c92 100644
--- a/tools/lint/tests/interactive/debug.test
+++ b/tools/lint/tests/interactive/debug.test
@@ -3,28 +3,28 @@
 set mdir $::env(YANG_MODULES_DIR)
 
 test debug_dict {Check debug message DICT} {
--setup $ly_setup -cleanup $ly_cleanup -constraints {[ly_cmd_exists "debug"]} -body {
+-setup $ly_setup -cleanup $ly_cleanup -constraints {[yanglint_debug]} -body {
     ly_cmd "verb debug"
     ly_cmd "debug dict"
     ly_cmd "load modleaf" "DICT"
 }}
 
 test debug_xpath {Check debug message XPATH} {
--setup $ly_setup -cleanup $ly_cleanup -constraints {[ly_cmd_exists "debug"]} -body {
+-setup $ly_setup -cleanup $ly_cleanup -constraints {[yanglint_debug]} -body {
     ly_cmd "verb debug"
     ly_cmd "debug xpath"
     ly_cmd "load modmust" "XPATH"
 }}
 
 test debug_dep_sets {Check debug message DEPSETS} {
--setup $ly_setup -cleanup $ly_cleanup -constraints {[ly_cmd_exists "debug"]} -body {
+-setup $ly_setup -cleanup $ly_cleanup -constraints {[yanglint_debug]} -body {
     ly_cmd "verb debug"
     ly_cmd "debug dep-sets"
     ly_cmd "load modleaf" "DEPSETS"
 }}
 
 test debug_depsets_xpath {Check debug message DEPSETS and XPATH} {
--setup $ly_setup -cleanup $ly_cleanup -constraints {[ly_cmd_exists "debug"]} -body {
+-setup $ly_setup -cleanup $ly_cleanup -constraints {[yanglint_debug]} -body {
     ly_cmd "verb debug"
     ly_cmd "debug dep-sets xpath"
     ly_cmd "load modmust" "DEPSETS.*XPATH"