Run specs without parallel_test on travis

* Also include the DETECT_POLLUTING_SPECS flag

[#71948064]

Signed-off-by: James Myers <jmyers@pivotallabs.com>
Correct api doc for positioning buidpacks

Added the required buildpack guid to the resource name and removed stale
comment about 'position 0` buildpacks.

[#71328862]
Update API Docs checksum

Signed-off-by: Joseph Palermo <jpalermo@pivotallabs.com>