MB-7254: run cbdump_config correctly
MB-7254: run cbdump_config correctly

Since escript doesn't exit in the path defined in /usr/bin/env,
directive #!/usr/bin/env escript won't work under linux platform.
We need to explicitly specify path for escript. In this way, the
first line of escript will be ignored.

At the same time, always put the full path to escript so that
we can find it correctly no matter where to run the cbcollect_info

Change-Id: Ic952ce37ff540ff47029bf3732ba7f08190a0b80
Reviewed-on: http://review.couchbase.org/22888
Tested-by: Bin Cui <ed18693fff32c00e22495f4877a3b901bed09041@gmail.com>
Reviewed-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>
Tested-by: Steve Yen <ef850f73f7832052d3c6d9b5ddd3a1716d9a57f1@gmail.com>

pavel-blagodov/ns_server,mschoch/ns_server,nimishzynga/ns_server,daverigby/ns_server,ceejatec/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,membase/ns_server,ceejatec/ns_server,daverigby/ns_server,membase/ns_server,mschoch/ns_server,vzasade/ns_server,pavel-blagodov/ns_server,ceejatec/ns_server,pavel-blagodov/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,membase/ns_server,pavel-blagodov/ns_server,vzasade/ns_server,ceejatec/ns_server,mschoch/ns_server,membase/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,ceejatec/ns_server,nimishzynga/ns_server,vzasade/ns_server,membase/ns_server,daverigby/ns_server,vzasade/ns_server,daverigby/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,mschoch/ns_server,membase/ns_server,nimishzynga/ns_server,daverigby/ns_server,mschoch/ns_server,nimishzynga/ns_server