Add netcat on CentOS

[Delivers #54321446]

Signed-off-by: Tony Hansmann <thansmann@pivotallabs.com>
add devel packages for bzip2 and libcap2

* Header files require to compile genisoimage in bosh release
* We already these libraries installed but just not the headers

Signed-off-by: Tony Hansmann <thansmann@pivotallabs.com>