Added missing fallback from physical_block_size to hw_sector_size in sectorsize…

Added missing fallback from physical_block_size to hw_sector_size in sectorsize fact discovery for kernels older than May 2009.

References #5761

lib/ansible/module_utils/facts.py

@@ -739,7 +739,9 @@ class LinuxHardware(Hardware):
 
                     part['start'] = get_file_content(part_sysdir + "/start",0)
                     part['sectors'] = get_file_content(part_sysdir + "/size",0)
-                    part['sectorsize'] = get_file_content(part_sysdir + "/queue/physical_block_size",512)
+                    part['sectorsize'] = get_file_content(part_sysdir + "/queue/physical_block_size")
+                    if not part['sectorsize']:
+                        part['sectorsize'] = get_file_content(part_sysdir + "/queue/hw_sector_size",512)
                     part['size'] = module.pretty_bytes((float(part['sectors']) * float(part['sectorsize'])))
                     d['partitions'][partname] = part
 
@@ -756,7 +758,7 @@ class LinuxHardware(Hardware):
                 d['sectors'] = 0
             d['sectorsize'] = get_file_content(sysdir + "/queue/physical_block_size")
             if not d['sectorsize']:
-                d['sectorsize'] = 512
+                d['sectorsize'] = get_file_content(sysdir + "/queue/hw_sector_size",512)
             d['size'] = module.pretty_bytes(float(d['sectors']) * float(d['sectorsize']))
 
             d['host'] = ""