Increase LAST_INSERT_ID_BUFF_LEN for other data types for identity columns

[yitam]

#735

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This change is 

[coveralls]

Coverage remained the same at 73.301% when pulling 812db3d on yitam:issue735 into fafb7f4 on Microsoft:dev.

[codecov-io]

Codecov Report

Merging #742 into dev will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #742   +/-   ##
=======================================
  Coverage   78.99%   78.99%           
=======================================
  Files          25       25           
  Lines        7190     7190           
=======================================
  Hits         5680     5680           
  Misses       1510     1510

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