MM-31063: Change constants to use CamelCase (#16608)

* MM-31063: Change constants to use CamelCase

* store package

* change allcaps to camel case (#16615)

* New tools.mod

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

store/searchlayer/stop_word.go

@@ -3,5 +3,5 @@
 
 package searchlayer
 
-var MYSQL_STOP_WORDS = []string{"a", "about", "an", "are", "as", "at", "be", "by", "com", "de", "en", "for", "from", "how", "i", "in", "is", "it", "la", "of",
+var MySQLStopWords = []string{"a", "about", "an", "are", "as", "at", "be", "by", "com", "de", "en", "for", "from", "how", "i", "in", "is", "it", "la", "of",
 	"on", "or", "that", "the", "this", "to", "was", "what", "when", "where", "who", "will", "with", "und", "the", "www"}