BugFix: cisco_ios show ip ospf database router and network: Make leading spaces optional

[ariesgeek]

ISSUE TYPE

• Bugfix Pull Request

COMPONENT

cisco_ios_show_ip_ospf_database_router.textfsm
cisco_ios_show_ip_ospf_database_network.textfsm

Cisco IOS

show ip ospf database router
show ip ospf database network

SUMMARY

Fixes #649

When entered manually via the Cisco IOS CLI, these commands contain leading spaces, but when the command is issued via automated means, such as Netmiko, leading spaces are typically truncated.

Prior to this commit, the command output would match the template only if one or more space characters preceded the OSPF Router with ID heading.

This commit ensures that the command output is matched whether the leading space characters are truncated or left intact.

Resolves the following error:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/utilities.py", line 347, in wrapper_decorator
    return func(self, *args, **kwargs)
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/base_connection.py", line 1447, in send_command
    template=textfsm_template,
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/utilities.py", line 280, in get_structured_data
    return _textfsm_parse(textfsm_obj, raw_output, attrs)
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/utilities.py", line 252, in _textfsm_parse
    textfsm_obj.ParseCmd(raw_output, attrs)
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/_textfsm/_clitable.py", line 272, in ParseCmd
    self.table = self._ParseCmdItem(self.raw, template_file=template_files[0])
  File "/home/me/.venv/lib64/python3.6/site-packages/netmiko/_textfsm/_clitable.py", line 303, in _ParseCmdItem
    for record in fsm.ParseText(cmd_input):
  File "/home/me/.venv/lib64/python3.6/site-packages/textfsm/parser.py", line 895, in ParseText
    self._CheckLine(line)
  File "/home/me/.venv/lib64/python3.6/site-packages/textfsm/parser.py", line 944, in _CheckLine
    if self._Operations(rule, line):
  File "/home/me/.venv/lib64/python3.6/site-packages/textfsm/parser.py", line 1025, in _Operations
    % (rule.line_num, line))
textfsm.parser.TextFSMError: State Error raised. Rule Line: 23. Input Line: OSPF Router with ID (10.10.10.10) (Process ID 1)

[FragmentedPacket]

Thanks very much for this PR. It's your first contribution to our repo and it was extremely detailed and we greatly appreciate it!