Revamped the jdbc pooled connection source to add keep-alive thread and connection testing.
Revamped the jdbc pooled connection source to add keep-alive thread and connection testing.

lobo12/ormlite-core,magicgoose/ormlite-core,ylfonline/ormlite-core,dankito/ormlite-jpa-core,ylcolala/ormlite-core,j256/ormlite-core