[IMP] mis_builder: remove _ from some method names

because they are part of the public API (though not usable over rpc)

mis_builder/models/mis_report.py

@@ -768,7 +768,7 @@ class MisReport(models.Model):
     # TODO: kpi name cannot be start with query name
 
     @api.multi
-    def _prepare_kpi_matrix(self):
+    def prepare_kpi_matrix(self):
         self.ensure_one()
         kpi_matrix = KpiMatrix(self.env)
         for kpi in self.kpi_ids:
@@ -776,7 +776,7 @@ class MisReport(models.Model):
         return kpi_matrix
 
     @api.multi
-    def _prepare_aep(self, company):
+    def prepare_aep(self, company):
         self.ensure_one()
         aep = AEP(self.env)
         for kpi in self.kpi_ids:
@@ -853,7 +853,7 @@ class MisReport(models.Model):
         return res
 
     @api.multi
-    def _declare_and_compute_period(self, kpi_matrix,
+    def declare_and_compute_period(self, kpi_matrix,
                                    col_key,
                                    col_description,
                                    col_comment,
@@ -866,7 +866,8 @@ class MisReport(models.Model):
                                    get_additional_query_filter=None):
         """ Evaluate a report for a given period, populating a KpiMatrix.
 
-        :param kpi_matrix: the KpiMatrix object to be populated
+        :param kpi_matrix: the KpiMatrix object to be populated created
+                           with prepare_kpi_matrix()
         :param col_key: the period key to use when populating the KpiMatrix
         :param aep: an AccountingExpressionProcessor instance created
                     using _prepare_aep()

mis_builder/models/mis_report_instance.py

@@ -353,8 +353,8 @@ class MisReportInstance(models.Model):
     @api.multi
     def _compute_matrix(self):
         self.ensure_one()
-        aep = self.report_id._prepare_aep(self.company_id)
-        kpi_matrix = self.report_id._prepare_kpi_matrix()
+        aep = self.report_id.prepare_aep(self.company_id)
+        kpi_matrix = self.report_id.prepare_kpi_matrix()
         for period in self.period_ids:
             if period.date_from == period.date_to:
                 comment = self._format_date(period.date_from)
@@ -362,7 +362,7 @@ class MisReportInstance(models.Model):
                 date_from = self._format_date(period.date_from)
                 date_to = self._format_date(period.date_to)
                 comment = _('from %s to %s') % (date_from, date_to)
-            self.report_id._declare_and_compute_period(
+            self.report_id.declare_and_compute_period(
                 kpi_matrix,
                 period.id,
                 period.name,