[beeKeyManager]
- New Spec of beeKeyManager
1. getKeyString -> getHexKey
2. The amount of users should not over 20
   -> The length of each username should not over 20
3. Parameters provided are not accurate
   -> The parameters format must be [[^=& ]+=[^=& ]+&]*[^=& ]+=[^=& ]+ (Ex:keyName=key1&users=u1,u2)
[beeKeyManager]
- fix beeKeyManager getHexKey to getHexkey
[beeKeyManager]
- Add Longevity Test for Key life cycle (BEEK026)
- Add su_user to wrap_local function
- fix hexkey bug in assertCheck (utils)