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##### SUMMARY
<!--- Explain the problem briefly below -->
As of Ansible 2.7 the `--force-handlers` option is no longer running the handler/s on all hosts when used with strategy free. Only tested back to 2.5 and this was working as I would expect it to on 2.5 & 2.6.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
<!--- Write the short name of the module, plugin, task or feature below, use your best guess if unsure -->
plugins/strategy 

##### ANSIBLE VERSION
<!--- Paste verbatim output from "ansible --version" between quotes -->
```paste below
ansible 2.10.0.dev0
  config file = /Users/bdudas/dev-net/handlers/ansible.cfg
  configured module search path = [u'/Users/bdudas/.ansible/plugins/modules', u'/usr/share/ansible/plugins/modules']
  ansible python module location = /Users/bdudas/dev-net/handlers/ansible/lib/ansible
  executable location = /Users/bdudas/dev-net/handlers/ansible/bin/ansible
  python version = 2.7.16 (default, Oct 16 2019, 00:34:56) [GCC 4.2.1 Compatible Apple LLVM 10.0.1 (clang-1001.0.37.14)]
```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
DEFAULT_STRATEGY(/Users/bdudas/dev-net/handlers/ansible.cfg) = free
HOST_KEY_CHECKING(/Users/bdudas/dev-net/handlers/ansible.cfg) = False
RETRY_FILES_ENABLED(/Users/bdudas/dev-net/handlers/ansible.cfg) = False
```

##### OS / ENVIRONMENT
<!--- Provide all relevant information below, e.g. target OS versions, network device firmware, etc. -->


##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->

<!--- Paste example playbooks or commands between quotes below -->
```yaml
---
- hosts: all
  gather_facts: false

  tasks:
    - command: hostname
      register: id
      notify: recovery_x

    - debug:
        var: id

    - name: failure
      fail: msg="Testing Failure"
      when: inventory_hostname == 'covfefe'

  handlers:
    - name: recovery_x
      shell: hostname
...
```
ansible-playbook <playbook.yml> --force-handlers
<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
Handlers will run against all hosts when using the `--force-handlers` option. 

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
Handler is only run on 1 of the 2 target hosts.
<!--- Paste verbatim command output between quotes -->
```paste below

```

super(StrategyModule, self).__init__(tqm)
        self._host_pinned = False
    def run(self, iterator, play_context):
        '''
        The "free" strategy is a bit more complex, in that it allows tasks to
        be sent to hosts as quickly as they can be processed. This means that
        some hosts may finish very quickly if run tasks result in little or no
        work being done versus other systems.
        The algorithm used here also tries to be more "fair" when iterating
        through hosts by remembering the last host in the list to be given a task
        and starting the search from there as opposed to the top of the hosts
        list again, which would end up favoring hosts near the beginning of the
        list.
        '''
        
        last_host = 0
        result = self._tqm.RUN_OK
        
        workers_free = len(self._workers)
        self._set_hosts_cache(iterator._play)
        work_to_do = True
        while work_to_do and not self._tqm._terminated:
            hosts_left = self.get_hosts_left(iterator)
            if len(hosts_left) == 0:
                self._tqm.send_callback('v2_playbook_on_no_hosts_remaining')
                result = False
                break
            work_to_do = False        
            starting_host = last_host