[MacPorts] #57698: Travis: Use the normal MacPorts installer

[MacPorts]

#57698: Travis: Use the normal MacPorts installer
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  Reporter:  ryandesign      |      Owner:  admin@…
      Type:  defect          |     Status:  new
  Priority:  Normal          |  Milestone:
 Component:  server/hosting  |    Version:
Resolution:                  |   Keywords:
      Port:                  |
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Comment (by l2dy):

 Replying to [comment:8 ryandesign]:
 > Replying to [comment:6 l2dy]:
 > > We can merge the Travis configurations (in a new commit, not git-
 merge), but I'd suggest creating a new bintray account for uploading
 (currently using `l2dybot`). Travis CI supports deploying tags only:
 https://docs.travis-ci.com/user/deployment/#conditional-releases-with-on.
 >
 > I don't understand the issues you're talking about, but we do have a
 "macports" account at Bintray that's not currently being used for
 anything.

 I'd like to use a more "official" account for uploading, e.g.
 `macportsbot`. `macports` on Bintray is currently an organization, not a
 user, and only users can have API keys to put into `.travis.yml` (with
 encryption).

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Ticket URL: <https://trac.macports.org/ticket/57698#comment:11>
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