7186799: Regression tests for ImageIO metadata fail on second run
Reviewed-by: prr, bae
Contributed-by: Vadim Pakhnushev <vadim.pakhnushev@oracle.com>

6943119: Rebrand source copyright notices
Reviewed-by: darcy, weijun

5082756: Image I/O plug-ins set metadata boolean attributes to "true" or "false"
Reviewed-by: igor, prr
Contributed-by: Martin von Gagern <martin.vgagern@gmx.net>