cask-test: fix reinstall a non installed Cask

Trying to uninstall a non installed Cask made this test fail.
This commit remove that and thus this test passes.
Note that every Cask is uninstalled after each test case.

Update the CaskAlreadyInstalledError with new reinstall command

e.g. this changes:

```
To re-install google-chrome, run:
  brew cask uninstall --force google-chrome && brew cask install google-chrome
```

To:

```
To re-install google-chrome, run:
  brew cask reinstall google-chrome
```

Revert "os/mac: MachO.dynamically_linked_libraries filtering."

os/mac: MachO.dynamically_linked_libraries filtering.

Tap tests: sort tap names for comparison

Prevents namespace conflict with vendored ruby-macho.

This allows us to filter out weak linkages during audits, preventing
a false error from occurring when the dylib cannot be found.

Revise Troubleshooting.md

Do not recommend pydistutils.cfg hack, this breaks default pip command

brew.sh: bump hardcoded minor version.

brew.sh: disable running Homebrew as root.

compat/sha1: disable SHA-1 support.

Add static libs and dylibs commonly put in /usr/local/lib by Symantec…

This has been deprecated for quite a while now so disabling seems
reasonable.

November 1st 2016 has come and gone so it's time to disable this.

Also, add comments explaining why the things that have been whitelisted
have been (to avoid more being added without good justification).

formulary: migrate fully-scoped formulae names.

Improve debugging information based on failures

software_spec: no `_or_later` in bottle filenames.

bottle: improve relocatability check

Given how common it is for formulae to hard-code `etc` and `var`, check
for those paths (`/usr/local/etc` and `/usr/local/var`) when determing
relocatability.

update-report: default Caskroom moved to prefix.

It's more useful to be able to "bless" an existing bottle to be used on
later OSs (e.g. where it cannot yet be built) than it is to have to
create a new, identical bottle just to have a different filename.

Look at HOMEBREW_PREFIX rather than HOMEBREW_REPOSITORY for the default
Caskroom location.