Move Jackson and SLF4J versions to properties
Move Jackson and SLF4J versions to properties

Since we have a number of dependnencies referencing the same version,
it'll be easier to keep them in sync if they're defined in one place.

TheRealAgentK/CFLint,TheRealAgentK/CFLint,cflint/CFLint,cflint/CFLint,TheRealAgentK/CFLint