Issue #958: Travis CI should enforce clang-format standards (#1026)

* Issue #958: Travis CI should enfore clang-format standards

This patch adds clang format support to the travis bots.

* Update path

* Roll back to version 8 since 9 is in test

* Cleanup clang

* Revert "Delete JSONCPP_DEPRECATED, use [[deprecated]] instead. (#978)" (#1029)

This reverts commit b27c83f691a03f521a1b3b99eefa2973f8e2bfcd.
diff --git a/src/jsontestrunner/main.cpp b/src/jsontestrunner/main.cpp
index d2d41aa..cb9db66 100644
--- a/src/jsontestrunner/main.cpp
+++ b/src/jsontestrunner/main.cpp
@@ -68,8 +68,8 @@
   return text;
 }
 
-static void
-printValueTree(FILE* fout, Json::Value& value, const Json::String& path = ".") {
+static void printValueTree(FILE* fout, Json::Value& value,
+                           const Json::String& path = ".") {
   if (value.hasComment(Json::commentBefore)) {
     fprintf(fout, "%s\n", value.getComment(Json::commentBefore).c_str());
   }
@@ -125,8 +125,7 @@
 static int parseAndSaveValueTree(const Json::String& input,
                                  const Json::String& actual,
                                  const Json::String& kind,
-                                 const Json::Features& features,
-                                 bool parseOnly,
+                                 const Json::Features& features, bool parseOnly,
                                  Json::Value* root) {
   Json::Reader reader(features);
   bool parsingSuccessful =