Fix logic that determines npm version to use

[davidebbo]

This was caused by a bug in an older version of kuduscript (see projectkudu/KuduScript#35). The bug has been fixed for a while, but once you generate your custom deploy.sh with the bug in it, you have to hand fix it, which is what this patch does.

[codecov-io]

Current coverage is 82.66%

Merging #1432 into hotfix/node-version-azure will not affect coverage as of 1f581b6

@@            hotfix/node-version-azure   #1432   diff @@
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  Files                              79      79       
  Stmts                            6108    6108       
  Branches                            0       0       
  Methods                             0       0       
=========================================================
  Hit                              5049    5049       
  Partial                             0       0       
  Missed                           1059    1059       

Review entire Coverage Diff as of 1f581b6

---

Uncovered Suggestions

1. +0.19% via .../js/profileeditor.js#324...335
2. +0.18% via .../js/profileeditor.js#269...279
3. +0.16% via .../report/js/report.js#259...268
4. See 7 more...

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[jasoncalabrese]

Nice catch, going to merge to the hotfix branch now, and we can verify that works then get the hotfix merged to master

[amazaheri]

Awesome!