Move EACL checks to SDK

[fyrchik]

Close #34 .

[alexvanin]

@cthulhu-rider Can you check if this integrates with storage node?

[alexvanin]

Integration tests for EACL are failed with this branch. Looking into it.

[carpawell]

The original code version of this PR fails some integration tests:

• Bearer Get object
• Bearer Head object

All errors were in the form of access to operation GET is denied by extended ACL check

eACL was in the form:

...
{
       "operation":"GET",
       "action":"ALLOW",
       "filters":[
          {
             "headerType":"OBJECT",
             "matchType":"STRING_EQUAL",
             "key":"$Object:objectID",
             "value":"3WSwLZNRNB2Y8uk48qFLZBcxi9hV3ra1jFon77YsM5gx"
          }
       ],
       "targets":[
          {
             "role":"USER"
          }
       ]
},
...

That errors could be fixed in separate PR that would bring the original code.

[carpawell]

Current code passes integration eACL tests.