feat(oxygen): replace try-except block with underlying method

Author: Matej Cotman

src/oxygen/oxygen.py

@@ -85,13 +85,12 @@ def __init__(self):
         self.run_time_data = {}
 
     def end_test(self, name, attributes):
-        try:
-            lib = BuiltIn().get_library_instance('oxygen.OxygenLibrary')
-            if lib:
-                self.run_time_data[attributes['longname']] = lib.data
-        except RuntimeError as error:
-            if str(error) != "No library 'oxygen.OxygenLibrary' found.":
-                raise error
+        libs = [*BuiltIn()._get_context().namespace.libraries]
+        if 'oxygen.OxygenLibrary' not in [lib.name for lib in libs]:
+            return
+        lib_instance = BuiltIn().get_library_instance('oxygen.OxygenLibrary')
+        if lib_instance:
+            self.run_time_data[attributes['longname']] = lib_instance.data
 
     def output_file(self, path):
         result = ExecutionResult(path)