gridlines: fix several old gridlines calls

Author: gauteh

opendrift/readers/basereader/__init__.py

@@ -289,8 +289,7 @@ def plot(self, variable=None, vmin=None, vmax=None, time=None,
             facecolor=cfeature.COLORS['land'],
             edgecolor='black')
 
-        gl = ax.gridlines(ccrs.PlateCarree(), draw_labels=True, x_inline=False, y_inline=False)
-        gl.top_labels = False
+        gl = ax.gridlines(ccrs.PlateCarree(), draw_labels=['left', 'bottom'], x_inline=False, y_inline=False)
 
         # Get boundary
         if self.global_coverage():

opendrift/readers/reader_schism_native.py

@@ -778,8 +778,7 @@ def plot_mesh(self, variable=None, vmin=None, vmax=None,
             facecolor=cfeature.COLORS['land'],
             edgecolor='black')
 
-        gl = ax.gridlines(ccrs.PlateCarree())
-        gl.xlabels_top = False
+        gl = ax.gridlines(ccrs.PlateCarree(), draw_labels=['left', 'bottom'])
 
         # Get boundary
         npoints = 10  # points per side