InnoDB insisted on closing the file handle before renaming a file.
Renaming a file should never be a problem on POSIX systems. Also on
Windows it should work if the file was opened in FILE_SHARE_DELETE
mode.

fil_space_t::stop_ios: Remove. We no longer need to stop file access
during rename operations.

fil_mutex_enter_and_prepare_for_io(): Remove the wait for stop_ios.

fil_rename_tablespace(): Remove the retry logic; do not close the
file handle. Remove the unused fault injection that was added along
with the DATA DIRECTORY functionality (MySQL WL#5980).

os_file_create_simple_func(), os_file_create_func(),
os_file_create_simple_no_error_handling_func(): Include FILE_SHARE_DELETE
in the share_mode. (We will still prevent multiple InnoDB instances
from using the same files by not setting FILE_SHARE_WRITE.)