Add valid computed property dictionary_path to StandardPipeline (#277)

* Updated StandardPipeline.setup() to set dictionary_path

IntegrationTestApi.get_deployment() uses the `dictionary_path` property of self.pipeline, so StandardPipeline.setup()  needs to set that value

* Replaced dictionary_path attribute with a property function for StandardPipeline

* Removed line causing CI check failure

Author: bevinduckett

src/fprime_gds/common/pipeline/standard.py

@@ -45,7 +45,6 @@ def __init__(self):
         self.distributor = None
         self.client_socket = None
         self.logger = None
-        self.dictionary_path = None
         self.up_store = None
         self.down_store = None
 
@@ -250,3 +249,8 @@ def files(self):
     def dictionaries(self):
         """Dictionaries member"""
         return self.__dictionaries
+
+    @property
+    def dictionary_path(self):
+        """Dictionary file path"""
+        return self.dictionaries.dictionary_path if self.dictionaries else None