#4607 No conflicts with nvim-lspconfig by default

Default `g:ale_disable_lsp` to a new mode `'auto'` by default. With this
setting applied, ALE will now check for the presence of nvim-lspconfig
and automatically turn off particular LSP linters if already configured
via nvim-lspconfig.

For users that do not use `nvim-lspconfig`, everything should work as
before.

test/linter/test_ansible_language_server.vader

@@ -1,5 +1,5 @@
 Before:
-  call ale#assert#SetUpLinterTest('ansible', 'ansible_language_server')
+  call ale#assert#SetUpLinterTest('ansible', 'language_server')
 
 After:
   call ale#assert#TearDownLinterTest()