[IMP] runbot: add more objects in run python

Since the use of the "python jobs", we spotted various needs that were
not fulfilled. In order to add flexibility to "python jobs", this commit
adds some useful objetcs in the _run_python eval context.

Also, the glob.glob function is given instead of the whole glob module
to avoid giving access to the os module via glob.os.

runbot/models/build_config.py

@@ -1,3 +1,4 @@
+import base64
 import glob
 import logging
 import os
@@ -211,7 +212,23 @@ class ConfigStep(models.Model):
                 build._log('create_build', 'created with config %s' % create_config.name, log_type='subbuild', path=str(children.id))
 
     def _run_python(self, build, log_path):
-        eval_ctx = {'self': self, 'build': build, 'log_path': log_path, 'docker_run': docker_run, 'glob': glob, '_logger': _logger, 'build_odoo_cmd': build_odoo_cmd}
+        eval_ctx = {
+            'self': self,
+            'fields': fields,
+            'models': models,
+            'build': build,
+            'docker_run': docker_run,
+            '_logger': _logger,
+            'log_path': log_path,
+            'glob': glob.glob,
+            'build_odoo_cmd': build_odoo_cmd,
+            'base64': base64,
+            're': re,
+            'time': time,
+            'grep': grep,
+            'get_py_version': get_py_version,
+            'rfind': rfind,
+        }
         return safe_eval(self.sudo().python_code.strip(), eval_ctx, mode="exec", nocopy=True)
 
     def _run_odoo_run(self, build, log_path):