Darwin: added network response checks to all curl and git calls. Also added --connect-timeout 30 to curl http calls

Darwin: reworked the python3 verification to be more accurate with apples default install of python 2.7.x

Ubuntu: moved mongodb install to /home/bhamilton/opt/mongodb formatting changes for ease of readability

CI system is having trouble here and it's possible others will as well. For some reason (failed previous builds) the mongo-cxx-driver temp dir is sticking around and causing problems since git clone will not stomp on it

It seems like the mongo-c-driver will elected to take a shared lib of libbson over rebuilding it as a static library. This yields a build error later on as the mongo-cxx libs can't find a static libbson. So enforce building of libbson internal to the mongo-c-driver build

Nearly all other libraries we link to is via static linkage (boost, k1 lib, llvm/clang, etc) so this one should follow suit. Otherwise users would still need to install it when using a binary package. Plus with at least a stock F27 it didn't "just work" after a make install for me.

added additional system and build information to eosio_build.sh. Added EOSIO information and links to end of build

Also fix abi_is_json.py script so that it works with multiple files at
once.

Amazon Linux: Added installing MongoDB and configuration file. Added conditions to identify linux distribution to python test script nodeos_run_test.py when running pgrep