Fix HAPI compliant csv header

Author: RichardHitier

tests/test_hapi_codecs.py

@@ -202,4 +202,4 @@ def test_hapi_csv_precision(self):
             df = pd.read_csv(tmp.name, comment='#', sep=',', header=None, skiprows=0, parse_dates=[0], index_col=0)
             self.assertAlmostEqual(float(df.iloc[0, 0]), float(imf_data.values[0, 0]), places=3)
             self.assertAlmostEqual(float(df.iloc[0, 1]), float(imf_data.values[0, 1]), places=3)
-            self.assertAlmostEqual(float(df.iloc[0, 2]), float(imf_data.values[0, 2]), places=3)
+            self.assertAlmostEqual(float(df.iloc[0, 2]), float(imf_data.values[0, 2]), places=3)