pkg/*: Fix misspell issues

See,
$ find . -type f | xargs misspell -locale US | grep -vi -e vendor -e devenv -e Unknwon -e Destory | grep pkg
./pkg/services/sqlstore/org_test.go:190:15: "frome" is a misspelling of "from"
./pkg/tsdb/elasticsearch/response_parser.go:544:24: "Unkown" is a misspelling of "Unknown"
./pkg/tsdb/opentsdb/opentsdb.go:87:20: "marshalling" is a misspelling of "marshaling"
./pkg/components/dynmap/dynmap_test.go:2:7: "Licence" is a misspelling of "License"
./pkg/components/dynmap/dynmap.go:2:7: "Licence" is a misspelling of "License"

pkg/components/dynmap/dynmap.go

@@ -1,5 +1,5 @@
 // uses code from https://github.com/antonholmquist/jason/blob/master/jason.go
-// MIT Licence
+// MIT License
 
 package dynmap
 

pkg/components/dynmap/dynmap_test.go

@@ -1,5 +1,5 @@
 // uses code from https://github.com/antonholmquist/jason/blob/master/jason.go
-// MIT Licence
+// MIT License
 
 package dynmap