int/string in snmp.xml value "Assert error"

[hack3rman]

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Describe the bug
According to the documentation you can assign values directly in the template. However I receive an assertion error and the only way is to define the value as variable in the template.

To Reproduce
Steps to reproduce the behavior:
1.

<mib name="IF-MIB">
    <symbol name="ifNumber">
        <value>2</value>
    </symbol>
</mib>

2. Restart
3. See error

Traceback (most recent call last):
  File "src/gevent/greenlet.py", line 906, in gevent._gevent_cgreenlet.Greenlet.run
  File "/home/conpot/.local/lib/python3.8/site-packages/conpot/protocols/snmp/snmp_server.py", line 185, in start
    self.xml_mib_config()
  File "/home/conpot/.local/lib/python3.8/site-packages/conpot/protocols/snmp/snmp_server.py", line 110, in xml_mib_config
    value = conpot_core.get_databus().get_value(
  File "/home/conpot/.local/lib/python3.8/site-packages/conpot/core/databus.py", line 43, in get_value
    assert key in self._data
AssertionError
2022-03-15T11:58:52Z <ServiceGreenlet "SNMPServer" at 0x7fca0dec4150: <bound method SNMPServer.start of <conpot.protocols.snmp.snmp_server.SNMPServer object at 0x7fca0deb5550>>('0.0.0.0', 16100)> failed with AssertionError

Expected behavior
int and strings should be interpreted directly in the module template.