Update version strings to 1.6.8

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.8

Update version strings to 1.6.7

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.7

Update version strings to 1.6.6

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.6

Update version strings to 1.6.5

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.5

Update version strings to 1.6.4

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.4

Update version strings to 1.6.3

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.3

Update version strings to 1.5.8

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.8

Update version strings to 1.6.2

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.2

Update version strings to 1.6.1

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.6.1

Update version strings to 1.5.7

mvn versions:set -DgenerateBackupPoms=false -DnewVersion=1.5.7