Add support for memory reservation

Signed-off-by: qhuang <qhuang@10.0.2.15>
Upstream-commit: aa1780997f42a3fbe3a7f9c7be2b8a5092b9b7c1
Component: engine

components/engine/docs/reference/commandline/create.md

@@ -50,6 +50,7 @@ Creates a new container.
       --lxc-conf=[]                 Add custom lxc options
       -m, --memory=""               Memory limit
       --mac-address=""              Container MAC address (e.g. 92:d0:c6:0a:29:33)
+      --memory-reservation=""       Memory soft limit
       --memory-swap=""              Total memory (memory + swap), '-1' to disable swap
       --memory-swappiness=""        Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
       --name=""                     Assign a name to the container

components/engine/docs/reference/commandline/run.md

@@ -50,6 +50,7 @@ weight=1
       --lxc-conf=[]                 Add custom lxc options
       -m, --memory=""               Memory limit
       --mac-address=""              Container MAC address (e.g. 92:d0:c6:0a:29:33)
+      --memory-reservation=""       Memory soft limit
       --memory-swap=""              Total memory (memory + swap), '-1' to disable swap
       --memory-swappiness=""        Tune a container's memory swappiness behavior. Accepts an integer between 0 and 100.
       --name=""                     Assign a name to the container