Bug 1271709 - fix eslint-plugin-mozilla .eslintrc; r=pbro

testing/eslint-plugin-mozilla/lib/rules/.eslintrc used the obsolete
"keyword-spacing" rule.  This patch fixes that and changes the top-level
.eslintignore so that local eslint rules are now checked.

MozReview-Commit-ID: KjVLasvPKh7

--HG--
extra : transplant_source : %AB%A2g%9F%26%E4%892%29%5Bs%7E%11%A67%00v%A2I%CC

.eslintignore

@@ -40,6 +40,8 @@ python/**
 rdf/**
 startupcache/**
 testing/**
+!testing/eslint-plugin-mozilla/
+testing/eslint-plugin-mozilla/node_modules/**
 tools/**
 uriloader/**
 view/**

testing/eslint-plugin-mozilla/lib/rules/.eslintrc

@@ -32,7 +32,7 @@
     "semi": [2, "always"],
     "space-before-blocks": 2,
     "space-before-function-paren": [2, "never"],
-    "space-before-keywords": 2,
+    "keyword-spacing": 2,
     "strict": [2, "global"],
   },