[fix] Rename EnergyPlus 9.1 installer properly

[hongyuanjia]

Pull request overview

• Fixes #495
• Fix the error in install_eplus(9.1) on Linux. The error is caused by file.copy() with same input for from and to.

[codecov[bot]]

Codecov Report

Merging #494 (44f100c) into master (b1805a2) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #494   +/-   ##
=======================================
  Coverage   91.66%   91.66%           
=======================================
  Files          36       36           
  Lines       14243    14243           
=======================================
  Hits        13056    13056           
  Misses       1187     1187           

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