[bosh_common] Allow boolean properties with false values

Change-Id: If41f76a58f411b491c1c925ffde220027833acb7
bosh_common 0.5.4

* Fix can't find property names
* Allow boolean properties with false values

Change-Id: I9ec0a0103261dc37f7a5441d44ace3de07ee43c6
[director] Use bosh_common 0.5.4

Change-Id: Ib2f6df031a6cbd195bcf02aa8cd8a8f89f2d828f
[agent] Use bosh_common 0.5.4

Change-Id: I96cd8c8a50f6713f14f904ca10f3a2be65b86471
Merge "[agent] Use bosh_common 0.5.4"
[agent] Fix bind_configuration error message

If there is an error when binding a template, return the correct
template line error.

Change-Id: I61a4360fe28eea78dc720e584c8877d7a96f4e79