stage/unit-create:new systemd unit config params

Added new systemd unit config : ConditionPathIsDirectory

Signed-off-by: Sayan Paul <paul.sayan@gmail.com>

stages/org.osbuild.systemd.unit.create

@@ -15,6 +15,7 @@ of options:
   - 'Unit' section
     - 'Description' - string
     - 'ConditionPathExists' - string
+    - 'ConditionPathIsDirectory' - string
     - 'DefaultDependencies' - bool
     - 'Requires' - [strings]
     - 'Wants' - [strings]
@@ -90,6 +91,12 @@ SCHEMA = r"""
                             "type": "string"
                         }
                     },
+                    "ConditionPathIsDirectory": {
+                        "type": "array",
+                        "items": {
+                            "type": "string"
+                        }
+                    },
                     "DefaultDependencies": {
                         "type": "boolean"
                     }

test/data/stages/systemd.unit.create/b.json

@@ -624,6 +624,9 @@
                 "DefaultDependencies": false,
                 "ConditionPathExists": [
                   "|!/etc/myfile"
+                ],
+                "ConditionPathIsDirectory": [
+                  "|!/etc/mydir"
                 ]
               },
               "Service": {

test/data/stages/systemd.unit.create/b.mpp.yaml

@@ -624,6 +624,9 @@
                 "DefaultDependencies": false,
                 "ConditionPathExists": [
                   "|!/etc/myfile"
+                ],
+                "ConditionPathIsDirectory": [
+                  "|!/etc/mydir"
                 ]
               },
               "Service": {