
##### SUMMARY
NVMe devices can have their serial number read by reading (eg) /sys/block/nvme1n1/device/serial, without having to try and run sg_inq, which requires root.

##### ISSUE TYPE
- Bug Report

##### COMPONENT NAME
Facts collection, linux.py

##### ANSIBLE VERSION
```paste below
$ ansible --version
ansible 2.10.0.dev0
  config file = None
  configured module search path = ['/local/apps/egsadmin/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules']
  ansible python module location = /local/apps/egsadmin/randy/ansible-src-current/lib/ansible
  executable location = /local/apps/egsadmin/randy/ansible-src-current/bin/ansible
  python version = 3.6.8 (default, Jun 11 2019, 15:15:01) [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)]

```

##### CONFIGURATION
<!--- Paste verbatim output from "ansible-config dump --only-changed" between quotes -->
```paste below
$ ansible-config dump --only-changed
<nothing>
```

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

##### STEPS TO REPRODUCE
<!--- Describe exactly how to reproduce the problem, using a minimal test-case -->
Run setup task with and without "become" on a system or VM with NVMe and observe that "serial" only appears with "become"

<!--- HINT: You can paste gist.github.com links for larger files -->

##### EXPECTED RESULTS
<!--- Describe what you expected to happen when running the steps above -->
ansible_devices[*].serial is populated for NVMe, regardless of become

##### ACTUAL RESULTS
<!--- Describe what actually happened. If possible run with extra verbosity (-vvvv) -->
ansible_devices[*].serial is populated for NVMe, regardless of become

uptime_facts = {}
        uptime_file_content = get_file_content('/proc/uptime')
        if uptime_file_content:
            uptime_seconds_string = uptime_file_content.split(' ')[0]
            uptime_facts['uptime_seconds'] = int(float(uptime_seconds_string))
        return uptime_facts
    def _find_mapper_device_name(self, dm_device):
        dm_prefix = '/dev/dm-'
        mapper_device = dm_device
        if dm_device.startswith(dm_prefix):
            dmsetup_cmd = self.module.get_bin_path('dmsetup', True)
            mapper_prefix = '/dev/mapper/'
            rc, dm_name, err = self.module.run_command("%s info -C --noheadings -o name %s" % (dmsetup_cmd, dm_device))
            if rc == 0:
                mapper_device = mapper_prefix + dm_name.rstrip()
        return mapper_device
    def get_lvm_facts(self):
        """ Get LVM Facts if running as root and lvm utils are available """
        lvm_facts = {}
        if os.getuid() == 0 and self.module.get_bin_path('vgs'):
            lvm_util_options = '--noheadings --nosuffix --units g --separator ,'
            vgs_path = self.module.get_bin_path('vgs')
            
            vgs = {}
            if vgs_path:
                rc, vg_lines, err = self.module.run_command('%s %s' % (vgs_path, lvm_util_options))
                for vg_line in vg_lines.splitlines():
                    items = vg_line.strip().split(',')
                    vgs[items[0]] = {'size_g': items[-2],