kpod exec

Initial wiring of kpod exec. We wont support the following options
for exec:

* detach -- unsure of use case
* detach-keys -- not supported by runc
* interactive -- all terminals will be interactive

Not adding exec tests as we need to think about how to support a
test that requires console access but our CI tests have no console.

Signed-off-by: baude <bbaude@redhat.com>

test/kpod_exec.bats

@@ -0,0 +1,30 @@
+#!/usr/bin/env bats
+
+load helpers
+
+function teardown() {
+    cleanup_test
+}
+
+function setup() {
+    copy_images
+}
+
+@test "exec into a bogus container" {
+    run ${KPOD_BINARY} ${KPOD_OPTIONS} exec foobar ls
+    echo "$output"
+    [ "$status" -eq 1 ]
+}
+
+@test "exec without command should fail" {
+    run ${KPOD_BINARY} ${KPOD_OPTIONS} exec foobar
+    echo "$output"
+    [ "$status" -eq 1 ]
+}
+
+@test "exec simple command" {
+    ${KPOD_BINARY} ${KPOD_OPTIONS} run -d -t --name foobar1 ${ALPINE} sleep 60
+    run ${KPOD_BINARY} ${KPOD_OPTIONS} exec foobar1 ls
+    echo "$output"
+    [ "$status" -eq 0 ]
+}