Add bazel rule to run buildifier; fix up formatting problems in bazel files

Change-Id: Ifa8ab12ed564fa2eaf5edd781281aa5cae52d17a
diff --git a/tools/dev/bash_profile b/tools/dev/bash_profile
index 88fb517..8fe5d5c 100644
--- a/tools/dev/bash_profile
+++ b/tools/dev/bash_profile
@@ -60,7 +60,7 @@
 
 # Short-hand for ONOS build, package and test.
 alias op="SHLVL=1 bazel build //:onos"
-alias ot="bazel query 'tests(//...)' | SHLVL=1 xargs bazel test"
+alias ot="bazel run //:buildifier_check && bazel query 'tests(//...)' | SHLVL=1 xargs bazel test"
 alias ob="op && ot"
 alias obd="SHLVL=1 bazel build //docs:external //docs:internal"