Add support for pid ns

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

Closes: #54
Approved by: umohnani8

test/kpod_run_ns.bats

@@ -0,0 +1,28 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function setup() {
+    copy_images
+}
+
+@test "run pidns test" {
+
+    ${KPOD_BINARY} ${KPOD_OPTIONS} pull ${ALPINE}
+
+    run bash -c "${KPOD_BINARY} ${KPOD_OPTIONS} run ${ALPINE}  sh -c 'echo \$\$'"
+    echo $output
+    [ "$status" -eq 0 ]
+    pid=$(echo $output | tr -d '\r')
+    [ $pid = "1" ]
+
+    run bash -c "${KPOD_BINARY} ${KPOD_OPTIONS} run --pid=host ${ALPINE}  sh -c 'echo \$\$'"
+    echo $output
+    pid=$(echo $output | tr -d '\r')
+    [ "$status" -eq 0 ]
+    [ $pid !=  "1" ]
+
+    run ${KPOD_BINARY} ${KPOD_OPTIONS} run --pid=badpid ${ALPINE} sh -c 'echo $$'
+    echo $output
+    [ "$status" -ne 0 ]
+}