Fix circular imports in serializers

[karolina-siemieniuk-morawska]

...:
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-82a7ec573853> in <module>
----> 1 from inspirehep.records.marshmallow.literature.common import PublicationInfoItemSchemaV1

~/src/inspirehep/backend/inspirehep/records/marshmallow/literature/__init__.py in <module>
      7 # flake8: noqa
      8
----> 9 from .authors import LiteratureAuthorsSchema
     10 from .base import (
     11     LiteratureAdminSchema,

~/src/inspirehep/backend/inspirehep/records/marshmallow/literature/authors.py in <module>
     10
     11 from ..fields import NestedWithoutEmptyObjects
---> 12 from .common import AuthorSchemaV1
     13 from .common.author import SupervisorSchema
     14

~/src/inspirehep/backend/inspirehep/records/marshmallow/literature/common/__init__.py in <module>
     11 from .collaboration import CollaborationSchemaV1
     12 from .collaboration_with_suffix import CollaborationWithSuffixSchemaV1
---> 13 from .conference_info_item import ConferenceInfoItemSchemaV1
     14 from .doi import DOISchemaV1
     15 from .external_system_identifier import ExternalSystemIdentifierSchemaV1

~/src/inspirehep/backend/inspirehep/records/marshmallow/literature/common/conference_info_item.py in <module>
      9
     10 from inspirehep.pidstore.api import PidStoreBase
---> 11 from inspirehep.records.api import InspireRecord
     12
     13

~/src/inspirehep/backend/inspirehep/records/api/__init__.py in <module>
     12 from .authors import AuthorsRecord  # noqa: F401
     13 from .base import InspireRecord  # noqa: F401
---> 14 from .conferences import ConferencesRecord  # noqa: F401
     15 from .data import DataRecord  # noqa: F401
     16 from .experiments import ExperimentsRecord  # noqa: F401

~/src/inspirehep/backend/inspirehep/records/api/conferences.py in <module>
      8 from inspirehep.pidstore.api.conferences import PidStoreConferences
      9 from inspirehep.records.api.base import InspireRecord
---> 10 from inspirehep.records.marshmallow.conferences import ConferencesElasticSearchSchema
     11 from inspirehep.records.models import (
     12     ConferenceLiterature,

~/src/inspirehep/backend/inspirehep/records/marshmallow/conferences/__init__.py in <module>
      7 # flake8: noqa
      8
----> 9 from .base import (
     10     ConferencesAdminSchema,
     11     ConferencesPublicListSchema,

~/src/inspirehep/backend/inspirehep/records/marshmallow/conferences/base.py in <module>
     11 from inspirehep.records.marshmallow.base import RecordBaseSchema
     12 from inspirehep.records.marshmallow.common import ContactDetailsItemWithoutEmail
---> 13 from inspirehep.records.marshmallow.conferences.common.proceeding_info_item import (
     14     ProceedingInfoItemSchemaV1,
     15 )

~/src/inspirehep/backend/inspirehep/records/marshmallow/conferences/common/proceeding_info_item.py in <module>
      7 from marshmallow import Schema, fields
      8
----> 9 from inspirehep.records.marshmallow.literature.common import PublicationInfoItemSchemaV1
     10
     11

ImportError: cannot import name 'PublicationInfoItemSchemaV1'

Moved from: inspirehep/inspirehep#1648