Fixed issue where collection exits when detecting Galaxy path prefix

changelogs/fragments/bug_galaxy_path_prefix.yml

@@ -0,0 +1,4 @@
+---
+bugfixes:
+  - Fixed issue where collection exits when detecting Galaxy path prefix
+...

plugins/module_utils/ah_api_module.py

@@ -504,16 +504,17 @@ def get_galaxy_path_prefix(self):
 
         try:
             response = self.make_request("GET", url)
-        except AHAPIModuleError as e:
-            self.fail_json(msg="Error while contacting server for Galaxy path prefix: {error} \nurl: {url}".format(error=e, url=url))
-        if response["status_code"] == 404:
-            return "/api/{prefix}".format(prefix=self.path_prefix.strip("/"))
-        else:
-            try:
-                rs_prefix = response["json"]["apis"]["galaxy"]
-            except KeyError as e:
-                self.fail_json(msg="Error while getting Galaxy api path prefix: {error}".format(error=e))
-            return rs_prefix.strip("/")
+        except AHAPIModuleError:
+            # 404 indicates this is standalone
+            if response["status_code"] == 404:
+                return "/api/{prefix}".format(prefix=self.path_prefix.strip("/"))
+            # indicates this is behind resource_provider
+            else:
+                try:
+                    rs_prefix = response["json"]["apis"]["galaxy"]
+                except KeyError as e:
+                    self.fail_json(msg="Error while getting Galaxy api path prefix: {error}".format(error=e))
+                return rs_prefix.strip("/")
 
     def get_server_version(self):
         """Return the automation hub/galaxy server version.