ElytronSubsystemMessages uses double quotes to surround string literals

Lots of things like this:

@Message(id = 910, value = "Password cannot be resolved for key-store \"%s\"")

Use ' instead of \". If the string ends up in a DMR ModelNode, which it often does, the output looks bad when double quotes are present.

For this ModelNode

ModelNode node = new ModelNode("Password cannot be resolved for key-store \"%s\"");

A call to node.toString() produces

"Password cannot be resolved for key-store \"%s\""

node.asString() is better, but that requires a special call vs the standard Object.toString

Password cannot be resolved for key-store "%s"

This is minor since we can try to ensure asString is used or perhaps even consider changing how toString works. But I think single quotes are a better practice.