python rule engine support + other plugin rule engines

[michael-conway]

per RE: [iROD-Chat:16899] rule engine weirdness when Python engaged

Add a rule engine instance flag to the exec rule code

You need to specify the rule engine instance which handles the irule invocation. Since python is first it will try to service the native rule language irule request, assuming you did not specify the native rule engine instance which I presume is second in the json array.

https://docs.irods.org/4.2.1/icommands/user/#irule
--rule-engine-plugin-instance,-r - run rule on the specified rule engine instance

[michael-conway]

review...

Failed tests:
  DataObjectAOImplTest.testSetReadAsAdmin:2986 null
  DataObjectAOImplTest.testSetWriteAsAdmin:3027 null
  DataObjectAOImplTest.testSetAccessPermissionRead:3421 null
  DataObjectAOImplTest.testSetAccessPermissionWrite:3454 secondary user cannot write file

Tests in error:
  DataObjectAOImplTest.testGetPermissionsOwn:3284 ▒ FileNotFound File not found
  EncryptionWrapperFactoryTest.testGetAesEncryptFromFactory:27 ▒ JargonRuntime c...
  AesCipherEncryptWrapperTest.testEncryptAes:51 ▒ JargonRuntime cannot generate ...

Tests run: 1515, Failures: 4, Errors: 3, Skipped: 0

[michael-conway]

example python user submitted rules

[michael-conway]

example user submitted python rule

https://irods.org/2016/07/writing-rules-for-the-python-rule-engine/

[michael-conway]

key iRODS code points

irule.cpp

  /* add key val for specifying instance on which to run rule */
    if ( argsMap.count( "rule-engine-plugin-instance" ) ) {
        addKeyVal( &execMyRuleInp.condInput, irods::CFG_INSTANCE_NAME_KW.c_str(), argsMap["rule-engine-plugin-instance"].as<std::string>().c_str() );
    }

const std::string CFG_INSTANCE_NAME_KW("instance_name");