general: no INSERT delayed usage

* No longer uses INSERT DELAYED, since, beginning with MySQL 5.5.7,
  INSERT DELAYED is always handled as a simple INSERT (that is,
  without the DELAYED option) whenever the value of binlog_format is
  STATEMENT or MIXED. (In the latter case, the statement no longer
  triggers a switch to row-based logging, and so is logged using the
  statement-based format.)
  (closes #2268)

Signed-off-by: Samuele Kaplun <samuele.kaplun@cern.ch>
Reported-by: Thorsten Schwander <thorsten.schwander@gmail.com>
1: D100 Docstring missing
4: I102 copyright year is outdated, expected 2014 but got 2012
21:4: E121 continuation line under-indented for hanging indent
24:6: E126 continuation line over-indented for hanging indent
30:1: E302 expected 2 blank lines, found 1
30: D209 Put multi-line docstring closing quotes on separate line
30: D205 Blank line missing between one-line summary and description
30: D208 Docstring is over-indented
42:21: E261 at least two spaces before inline comment
44:20: E261 at least two spaces before inline comment
49:1: E302 expected 2 blank lines, found 1
49: D400 First line should end with '.', not 'D'
49: D205 Blank line missing between one-line summary and description
49: D208 Docstring is over-indented
58:48: E502 the backslash is redundant between brackets
59:66: E502 the backslash is redundant between brackets
60:59: E502 the backslash is redundant between brackets
63:1: E302 expected 2 blank lines, found 1
63: D400 First line should end with '.', not 'y'
63: D205 Blank line missing between one-line summary and description
63: D208 Docstring is over-indented
74:18: E261 at least two spaces before inline comment
77:10: E261 at least two spaces before inline comment
80:65: E502 the backslash is redundant between brackets
81:56: E502 the backslash is redundant between brackets
82:57: E502 the backslash is redundant between brackets
93:76: E502 the backslash is redundant between brackets
94:47: E502 the backslash is redundant between brackets
95:76: E502 the backslash is redundant between brackets
96:48: E502 the backslash is redundant between brackets