[Analyzer] Change no-integrate default build configurations to not be empty

Closes https://github.com/CocoaPods/CocoaPods/issues/2879.

[Linter] Split linter messages from attribute names

Related to Core/#199. Makes linter messages more modular and informative

Closes https://github.com/CocoaPods/CocoaPods/issues/2868

You'll see output at the end of a run like:

```
[!] Skipping test due to missing `hg` executable: Installs a Pod with different subspecs activated across different targets

[!] Skipping test due to missing `hg` executable: Installs a Pod with an external source
```

This reverts commit 581eb06a.

Conflicts:
	Rakefile

[HooksManager] Show the name of the source for each hook that is run in verbose mode

“Register slather for post install” vs “Register for post install
slather”

We're incorrectly comparing the hook name instead of the plugin name in
the whitelist

Huge thanks to @alloy for the `source_location` hint!

The name calculation is wrapped in a lambda so it's not called when it won't be printed out

[Analyzer] Use specific checkout options from lockfile