#158 update the wording to be environment variables
#158 update the wording to be environment variables

Signed-off-by: Emily Jiang <d9e2c5385c77ad62db75d084ed23e511a308a5a9@googlemail.com>

jmesnil/microprofile-config,OndrejM/microprofile-config,microprofile/microprofile-config,OndrejM/microprofile-config