Bump version to 1.5.11 [#132753491]

Signed-off-by: James Wen <jrw2175@columbia.edu>

Bump version to 1.5.10 [#130671721]

Signed-off-by: James Wen <jrw2175@columbia.edu>

Bump version to 1.5.9 [#128000865]

Signed-off-by: Gabriel Ramirez <gabriel.e.ramirez@gmail.com>

Bump version to 1.5.8 [#122505821]

Bump version to 1.5.7 [#121676291]

Signed-off-by: Gabriel Ramirez <gabriel.e.ramirez@gmail.com>

Bump version to 1.5.6 [#119736173]

Signed-off-by: David Jahn <david.a.jahn@gmail.com>

Bump version to 1.5.5 [#115779555]

Bump version to 1.5.4

Signed-off-by: David Jahn <david.a.jahn@gmail.com>

Bump version to 1.5.3

Signed-off-by: Brandon Shroyer <bshroyer@pivotal.io>

Bump version to 1.5.2

Signed-off-by: David Morhovich <dmorhovich@pivotal.io>