TT#43306 NGCP::Template::Object: Only match li_dist exactly

This partially reverts commit bc8ae9e795.

We should not match li_dist with regexes as then we would trap cases
that we should not be covering by the li_dist mapping logic. Just do
exact matches.

This also fixes the hypothetical case with other regexes that are not
the wrongly specified '*'.

Change-Id: I9d9d850969e03fa9dc587f2d47a688bc0359e63c

lib/NGCP/Template/Object.pm

@@ -21,19 +21,14 @@ sub has_role
 {
     my ($self, $hostname, $role) = @_;
 
-    my $li_check = 1;
-    if ($role eq '*') {
-        $role = '.+';
-        $li_check = 0;
-    }
-
     if (not defined $self->{config}{hosts}{$hostname}) {
         $hostname = 'self';
     }
 
     # The LI role has a virtual role counterpart, which is active only in
-    # distributed mode.
+    # distributed mode. We only check for exact matches, as we do not want
-    if ($li_check && 'li_dist' =~ m/^$role$/) {
+    # to grab a regex that would match multiple cases.
+    if ('li_dist' eq $role) {
         if ($self->{config}{cluster_sets}{type} eq 'distributed') {
             $role = 'li';
         } else {
@@ -44,7 +39,7 @@ sub has_role
     if (any { m/^$role$/ } @{$self->{config}{hosts}{$hostname}{role}}) {
         # The LI roles are a bit special, they use additional keys to get
         # enabled, so we handle them here.
-        if ($li_check && 'li' =~ m/^$role$/) {
+        if ('li' =~ m/^$role$/) {
             return $self->{config}{intercept}{enable} eq 'yes';
         } else {
             # Otherwise, unconditionally enable the role.