Remove superfluous include on iosxr filesystems fact gathering (#21775)

The regex will catch only lines that start with 'Directory of' regardless.
Also, fixing unit tests while at it.

lib/ansible/modules/network/iosxr/iosxr_facts.py

@@ -166,11 +166,11 @@ class Default(FactsBase):
 class Hardware(FactsBase):
 
     def commands(self):
-        return(['dir /all | include Directory', 'show memory summary'])
+        return(['dir /all', 'show memory summary'])
 
     def populate(self, results):
         self.facts['filesystems'] = self.parse_filesystems(
-            results['dir /all | include Directory'])
+            results['dir /all'])
 
         match = re.search(r'Physical Memory (\d+)M total \((\d+)',
             results['show memory summary'])

test/units/modules/network/iosxr/fixtures/dir_7all

@@ -0,0 +1,6 @@
+Directory of disk0:
+file1
+file2
+
+Directory of flash0:
+file3

test/units/modules/network/iosxr/fixtures/dir_7all_1_include_Directory

@@ -1 +0,0 @@
-lollll

test/units/modules/network/iosxr/test_iosxr_facts.py

@@ -52,7 +52,6 @@ class TestIosxrFacts(TestIosxrModule):
                     command = item
                 filename = str(command).replace(' ', '_')
                 filename = filename.replace('/', '7')
-                filename = filename.replace('|', '1')
                 output.append(load_fixture(filename))
             return output
 
@@ -66,7 +65,7 @@ class TestIosxrFacts(TestIosxrModule):
         self.assertIn('default', ansible_facts['ansible_net_gather_subset'])
         self.assertIn('interfaces', ansible_facts['ansible_net_gather_subset'])
         self.assertEquals('iosxr01', ansible_facts['ansible_net_hostname'])
-        self.assertEquals([], ansible_facts['ansible_net_filesystems'])
+        self.assertEquals(['disk0:', 'flash0:'], ansible_facts['ansible_net_filesystems'])
         self.assertIn('GigabitEthernet0/0/0/0',
             ansible_facts['ansible_net_interfaces'].keys())