build: move e2e dependencies into e2e/go.mod

Several packages are only used while running the e2e suite. These
packages are less important to update, as the they can not influence the
final executable that is part of the Ceph-CSI container-image.

By moving these dependencies out of the main Ceph-CSI go.mod, it is
easier to identify if a reported CVE affects Ceph-CSI, or only the
testing (like most of the Kubernetes CVEs).

Signed-off-by: Niels de Vos <ndevos@ibm.com>

e2e/vendor/github.com/mistifyio/go-zfs/.travis.yml

@@ -0,0 +1,43 @@
+language: go
+dist: trusty
+sudo: required
+cache:
+  directories:
+    - $HOME/.ccache
+    - $HOME/zfs
+
+branches:
+  only:
+    - master
+
+env:
+  - rel=0.6.5.11
+  - rel=0.7.6
+
+go:
+  - "1.10.x"
+  - master
+
+before_install:
+  - export MAKEFLAGS=-j$(($(grep -c '^processor' /proc/cpuinfo) * 2 + 1))
+  - export PATH=/usr/lib/ccache:$PATH
+  - go get github.com/alecthomas/gometalinter
+  - gometalinter --install --update
+  - sudo apt-get update -y && sudo apt-get install -y libattr1-dev libblkid-dev linux-headers-$(uname -r) tree uuid-dev
+  - mkdir -p $HOME/zfs
+  - cd $HOME/zfs
+  - [[ -d spl-$rel.tar.gz ]] || curl -L https://github.com/zfsonlinux/zfs/releases/download/zfs-$rel/spl-$rel.tar.gz | tar xz
+  - [[ -d zfs-$rel.tar.gz ]] || curl -L https://github.com/zfsonlinux/zfs/releases/download/zfs-$rel/zfs-$rel.tar.gz | tar xz
+  - (cd spl-$rel && ./configure --prefix=/usr && make && sudo make install)
+  - (cd zfs-$rel && ./configure --prefix=/usr && make && sudo make install)
+  - sudo modprobe zfs
+  - cd $TRAVIS_BUILD_DIR
+
+script:
+  - sudo -E $(which go) test -v ./...
+  - gometalinter --vendor --vendored-linters ./... || true
+  - gometalinter --errors --vendor --vendored-linters ./...
+
+notifications:
+  email: false
+  irc: "chat.freenode.net#cerana"