Fix order place quantity option

[FernandoOjeda]

Fix order place quantity option #1116.

>slcli order place --help

Options:
  --preset TEXT                         The order preset (if required by the package)
  --verify                              Flag denoting whether or not to only verify the order, not place it
  --quantity INTEGER                    The quantity of the item being ordered
  --billing [hourly|monthly]            Billing rate  [default: hourly]
  --complex-type TEXT                   The complex type of the order. This typically begins with                                                       'SoftLayer_Container_Product_Order_'.
  --extras TEXT                         JSON string denoting extra data that needs to be sent with the order
  -h, --help                            Show this message and exit.

Example1:
>slcli order place --quantity 2 --billing monthly VIRTUAL_ROUTER_APPLIANCE_1_GPBS DALLAS05 INTEL_INTEL_XEON_E31270_V6_3_80 OS_JUNIPER_VSRX_15_X_UP_TO_1GBPS_STANDARD RAM_32_GB_DDR4_2133_ECC_NON_REG DISK_CONTROLLER_RAID HARD_DRIVE_3_00TB_SATA_III SRIOV_ENABLED BANDWIDTH_5000_GB MONITORING_HOST_PING 1_GBPS_REDUNDANT_PUBLIC_PRIVATE_NETWORK_UPLINKS REBOOT_KVM_OVER_IP 1_IP_ADDRESS NOTIFICATION_EMAIL_AND_TICKET AUTOMATED_NOTIFICATION UNLIMITED_SSL_VPN_USERS_1_PPTP_VPN_USER_PER_ACCOUNT NESSUS_VULNERABILITY_ASSESSMENT_REPORTING --complex-type SoftLayer_Container_Product_Order_Hardware_Server_Gateway_Appliance --extras '{"hardware":[{"hostname":"gateway01","domain":"example.com"},{"hostname":"gateway02","domain":"example.com"}]}'

Output:
:...................................................................................:
: name : value :
:...................................................................................:
: id : 35311111 :
: created : 2019-03-19T10:04:09-06:00 :
: status : PENDING_AUTO_APPROVAL :
:....................................................................................

Example2:
By default the quantity is 1:
>slcli order place --billing monthly VIRTUAL_ROUTER_APPLIANCE_1_GPBS DALLAS05 INTEL_INTEL_XEON_E31270_V6_3_80 OS_JUNIPER_VSRX_15_X_UP_TO_1GBPS_STANDARD RAM_32_GB_DDR4_2133_ECC_NON_REG DISK_CONTROLLER_RAID HARD_DRIVE_3_00TB_SATA_III SRIOV_ENABLED BANDWIDTH_5000_GB MONITORING_HOST_PING 1_GBPS_REDUNDANT_PUBLIC_PRIVATE_NETWORK_UPLINKS REBOOT_KVM_OVER_IP 1_IP_ADDRESS NOTIFICATION_EMAIL_AND_TICKET AUTOMATED_NOTIFICATION UNLIMITED_SSL_VPN_USERS_1_PPTP_VPN_USER_PER_ACCOUNT NESSUS_VULNERABILITY_ASSESSMENT_REPORTING --complex-type SoftLayer_Container_Product_Order_Hardware_Server_Gateway_Appliance --extras '{"hardware":[{"hostname":"gateway01","domain":"example.com"}]}'

Output:
:...................................................................................:
: name : value :
:...................................................................................:
: id : 35322222 :
: created : 2019-03-19T11:08:14-06:00 :
: status : PENDING_AUTO_APPROVAL :
:....................................................................................

Example3:
ORDER CLOUD_SERVER:
>slcli order place --quantity 2 --billing hourly CLOUD_SERVER AMSTERDAM GUEST_PRIVATE_CORE_1 RAM_2_GB OS_CENTOS_7_X_MINIMAL_64_BIT GUEST_DISK_25_GB_SAN BANDWIDTH_0_GB_2 1_GBPS_PUBLIC_PRIVATE_NETWORK_UPLINKS MONITORING_HOST_PING AUTOMATED_NOTIFICATION UNLIMITED_SSL_VPN_USERS_1_PPTP_VPN_USER_PER_ACCOUNT NESSUS_VULNERABILITY_ASSESSMENT_REPORTING 1_IP_ADDRESS NOTIFICATION_EMAIL_AND_TICKET REBOOT_REMOTE_CONSOLE --extras "{"privateCloudOrderFlag":false,"useHourlyPricing":true,""virtualGuests": [{"hostname": "test", "domain": "softlayer.com"},{"hostname": "test1", "domain": "softlayer.com"}]}" --complex-type SoftLayer_Container_Product_Order_Virtual_Guest

Output:
:...................................................................................:
: name : value :
:...................................................................................:
: id : 35333333 :
: created : 2019-03-19T11:15:28-06:00 :
: status : PENDING_AUTO_APPROVAL :
:....................................................................................

[coveralls]

Coverage increased (+0.002%) to 91.707% when pulling 099175c on FernandoOjeda:fo_order_place_quantity into 428753b on softlayer:master.