Fix #2159 Mark Field() as obsolete in favor of Path()

Author: gmarz

src/Nest/Search/Suggesters/ContextSuggester/ISuggestContext.cs

@@ -29,8 +29,15 @@ public abstract class SuggestContextDescriptorBase<TDescriptor, TInterface, T> :
 		string ISuggestContext.Type => this.Type;
 		Field ISuggestContext.Path { get; set; }
 
+		[Obsolete("Removed in 5.0. Use Path() instead.")]
 		public TDescriptor Field(Field field) => Assign(a => a.Path = field);
 
+		[Obsolete("Removed in 5.0. Use Path() instead.")]
 		public TDescriptor Field(Expression<Func<T, object>> objectPath) => Assign(a => a.Path = objectPath);
+
+		public TDescriptor Path(Field path) => Assign(a => a.Path = path);
+
+		public TDescriptor Path(Expression<Func<T, object>> objectPath) => Assign(a => a.Path = objectPath);
+
 	}
 }