license cleanup for vendored files

The following list of files are signaled by apache-rat as not having Apache-compatible licenses. Some need the license to be added while others may need to be added to the .rat-excludes file:

• BUILD_NUMBER
• traffic_ops/experimental/auth/server.key
• traffic_ops/experimental/ui/app/src/common/modules/table/_table.scss
• traffic_ops/experimental/ui/app/src/common/modules/widget/cacheGroups/_widget.cacheGroups.scss
• traffic_ops/experimental/ui/app/src/common/modules/widget/capacity/_widget.capacity.scss
• traffic_ops/experimental/ui/app/src/common/modules/widget/routing/_widget.routing.scss
• traffic_ops/experimental/ui/app/src/styles/loading.scss
• traffic_ops/experimental/ui/app/src/styles/theme.scss
• traffic_ops/experimental/webfront/server.key
• traffic_ops/experimental/webfront/simpleserver/server.key
• traffic_portal/app/src/styles/loading.scss
• traffic_stats/vendor/github.com/influxdata/influxdb/client/v2/client.go
• traffic_stats/vendor/github.com/influxdata/influxdb/client/v2/udp.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/consistency.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/inline_fnv.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/inline_strconv_parse.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/points.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/rows.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/statistic.go
• traffic_stats/vendor/github.com/influxdata/influxdb/models/time.go
• traffic_stats/vendor/github.com/influxdata/influxdb/pkg/escape/bytes.go
• traffic_stats/vendor/github.com/influxdata/influxdb/pkg/escape/strings.go
• traffic_stats/vendor/github.com/pkg/errors/appveyor.yml
• traffic_stats/vendor/github.com/pkg/errors/errors.go
• traffic_stats/vendor/github.com/pkg/errors/stack.go
• traffic_stats/vendor/golang.org/x/net/PATENTS
• traffic_stats/vendor/golang.org/x/net/publicsuffix/gen.go
• traffic_stats/vendor/golang.org/x/net/publicsuffix/list.go
• traffic_stats/vendor/golang.org/x/net/publicsuffix/table.go