2.1.0 version

K8SPG-294 Set release 1.4.0 image tags (percona#378)

Set release image tag for 2.0.0

K8SPG-239 update cr-minimal with release tag

K8SPG-190 Use release tags for 1.2.0

K8SPG-145 Use release operator version

K8SPG-128 PreRelease version upgrade (percona#138)

* K8SPG-128 Release version upgrade

* K8SPG-128 Get rid of typos

K8SPG-90 Update operator related file version

K8SPG-50 add default seccret (percona#62)