Remove route-based VPN solution

[alexbozhenko]

Remove "route" client transport that was added in #103
since it requires disabling port security.

Tested against 4 gateways + 6 clients in Iceland and 4 gateways and 6 clients in US-east:

solutions-library # cd bandwidth-test/ansible && ansible-playbook -i ../../strongswan-ipsec/ansible/vpn-test-rig/inventory-bandwidth.ini site.yml
       "==========================================================================",
        "BANDWIDTH TEST - 6 flow(s) measured at the receiver",
        "==========================================================================",
        "  flow                                  Gbps   secs   retrans",
        "  000-cl-ice-1-to-cl-use2-1             1.78   30.3     48593",
        "  001-cl-ice-2-to-cl-use2-2             1.92   30.3     39394",
        "  002-cl-ice-3-to-cl-use2-3             2.25   30.2         0",
        "  003-cl-ice-4-to-cl-use2-4             1.59   30.3    100600",
        "  004-cl-ice-5-to-cl-use2-5             1.39   30.2     29968",
        "  005-cl-ice-6-to-cl-use2-6             0.78   30.3      2747",
        "--------------------------------------------------------------------------",
        "  TOTAL                                 9.71 Gbps across 6 flow(s)",
        "  mean per flow                         1.62 Gbps",
        "  total retransmits                  221,302"

Same but with -e bw_mode=mesh -e bw_duration=15:

        "==========================================================================",
        "BANDWIDTH TEST - 39 flow(s) measured at the receiver",
        "==========================================================================",
        "  flow                                  Gbps   secs   retrans",
        "  000-cl-ice-1-to-cl-use2-1             0.41   15.8     60402",
        "  001-cl-ice-1-to-cl-use2-2             0.64   15.6     29016",
        "  001-cl-ice-2-to-cl-use2-2             1.92   30.3     39394",
        "  002-cl-ice-1-to-cl-use2-3             0.52   15.4     10835",
        "  002-cl-ice-3-to-cl-use2-3             2.25   30.2         0",
        "  003-cl-ice-1-to-cl-use2-4             0.46   15.1     34340",
        "  003-cl-ice-4-to-cl-use2-4             1.59   30.3    100600",
        "  004-cl-ice-1-to-cl-use2-5             0.03   15.5        20",
        "  004-cl-ice-5-to-cl-use2-5             1.39   30.2     29968",
        "  005-cl-ice-1-to-cl-use2-6             1.02   15.1     32263",
        "  005-cl-ice-6-to-cl-use2-6             0.78   30.3      2747",
        "  006-cl-ice-2-to-cl-use2-1             0.65   15.8     58318",
        "  007-cl-ice-2-to-cl-use2-2             0.88   15.6     73971",
        "  008-cl-ice-2-to-cl-use2-3             0.89   15.1         0",
        "  009-cl-ice-2-to-cl-use2-4             0.86   15.5     33426",
        "  010-cl-ice-2-to-cl-use2-5             0.42   15.1         0",
        "  011-cl-ice-2-to-cl-use2-6             0.58   15.5      6174",
        "  012-cl-ice-3-to-cl-use2-1             1.02   15.9     52532",
        "  013-cl-ice-3-to-cl-use2-2             0.48   15.4     18712",
        "  014-cl-ice-3-to-cl-use2-3             0.37   15.6      2458",
        "  015-cl-ice-3-to-cl-use2-4             0.74   15.3     53569",
        "  016-cl-ice-3-to-cl-use2-5             1.07   15.4      7512",
        "  017-cl-ice-3-to-cl-use2-6             0.40   15.1     25246",
        "  018-cl-ice-4-to-cl-use2-1             0.79   15.4     34416",
        "  019-cl-ice-4-to-cl-use2-2             0.52   15.5     13266",
        "  020-cl-ice-4-to-cl-use2-3             0.49   15.2       212",
        "  021-cl-ice-4-to-cl-use2-4             0.67   15.4     60628",
        "  022-cl-ice-4-to-cl-use2-5             0.85   15.3     39704",
        "  023-cl-ice-4-to-cl-use2-6             0.30   15.1     11789",
        "  024-cl-ice-5-to-cl-use2-1             0.94   15.3     59581",
        "  025-cl-ice-5-to-cl-use2-2             0.97   15.3     60573",
        "  026-cl-ice-5-to-cl-use2-3             0.26   15.3      1287",
        "  027-cl-ice-5-to-cl-use2-4             1.29   15.4     80114",
        "  028-cl-ice-5-to-cl-use2-5             0.55   16.0         0",
        "  029-cl-ice-5-to-cl-use2-6             1.08   15.1     40780",
        "  031-cl-ice-6-to-cl-use2-2             0.43   15.6     22541",
        "  032-cl-ice-6-to-cl-use2-3             1.06   15.7     38597",
        "  033-cl-ice-6-to-cl-use2-4             0.51   15.5     40673",
        "  035-cl-ice-6-to-cl-use2-6             1.31   15.2     13656",
        "--------------------------------------------------------------------------",
        "  TOTAL                                31.41 Gbps across 39 flow(s)",
        "  mean per flow                         0.81 Gbps",
        "  total retransmits                 1,189,320",