fix pickling error on session caching, webnotes.lang has __slots__
fix pickling error on session caching, webnotes.lang has __slots__

rohitwaghchaure/frappe,elba7r/frameworking,manassolanki/frappe,Amber-Creative/amber-frappe,indictranstech/frappe,vqw/frappe,mbauskar/omnitech-demo-frappe,pawaranand/phr_frappe,saurabh6790/phr-frappe,rohitwaghchaure/frappe,deveninfotech/deven-frappe,indictranstech/omnitech-frappe,almeidapaulopt/frappe,pombredanne/frappe,gangadharkadam/letzfrappe,PriyaShitole/MedViger-lib,gangadharkadam/frappecontribution,mbauskar/omnitech-frappe,frappe/frappe,gangadharkadam/frappecontribution,gangadhar-kadam/smrterpfrappe,saurabh6790/med_new_lib,saurabh6790/medsynaptic1-lib,elba7r/builder,saurabh6790/pow-lib,sbktechnology/trufil-frappe,anandpdoshi/frappe,gangadhar-kadam/verve_live_frappe,bohlian/frappe,saurabh6790/-aimobilize-lib,saurabh6790/omn-lib,saurabh6790/omni-libs,indautgrp/frappe,gangadharkadam/johnfrappe,saurabh6790/medlib,pawaranand/phr-frappe,gangadharkadam/vervefrappe,BhupeshGupta/frappe,rohitwaghchaure/frappe,gangadharkadam/saloon_frappe_install,gangadharkadam/shfr,shitolepriya/test-frappe,erpletzerp/letzerpcore,rohitwaghchaure/vestasi-frappe,gangadharkadam/saloon_frappe,rohitw1991/frappe,saurabh6790/medsynaptic1-lib,mbauskar/tele-frappe,suyashphadtare/propshikhari-frappe,indictranstech/osmosis-frappe,gangadhar-kadam/prjlib,deveninfotech/deven-frappe,ashokrajbathu/secondrep,shitolepriya/test-frappe,ashokrajbathu/secondrep,indictranstech/ebuy-now-frappe,gangadharkadam/shfr,saurabh6790/frappe,saurabh6790/omnitech-libs,saurabh6790/test-frappe,sbkolate/sap_frappe_v6,gangadharkadam/office_frappe,pdvyas/frappe,letzerp/framework,Tejal011089/digitales_frappe,saurabh6790/test-frappe,indictranstech/omnitech-frappe,jevonearth/frappe,saurabh6790/med_test_lib,bohlian/frappe,saurabh6790/omnisys-lib,almeidapaulopt/frappe,elba7r/frameworking,rohitwaghchaure/frappe_smart,indictranstech/fbd_frappe,pdvyas/frappe,tundebabzy/frappe,rohitwaghchaure/frappe-digitales,elba7r/frameworking,bohlian/frappe,praba230890/frappe,saurabh6790/omnisys-lib,rohitw1991/frappe,indictranstech/internal-frappe,mbauskar/frappe,ShashaQin/frappe,gangadharkadam/saloon_frappe_install,mbauskar/Das_frappe,saurabh6790/med_lib_test,gangadharkadam/v6_frappe,StrellaGroup/frappe,rohitw1991/smarttailorfrappe,rohitwaghchaure/New_Theme_frappe,pranalik/frappe-bb,rohitwaghchaure/frappe-alec,yashodhank/frappe,mbauskar/frappe,indictranstech/reciphergroup-frappe,MaxMorais/frappe,gangadharkadam/vlinkfrappe,neilLasrado/frappe,geo-poland/frappe,Tejal011089/digitales_frappe,vjFaLk/frappe,geo-poland/frappe,indictranstech/reciphergroup-frappe,elba7r/builder,indictranstech/internal-frappe,saurabh6790/omnitech-libs,indictranstech/reciphergroup-frappe,gangadharkadam/saloon_frappe,Amber-Creative/amber-frappe,yashodhank/frappe,saurabh6790/trufil_lib,Amber-Creative/amber-frappe,rohitwaghchaure/frappe_smart,saurabh6790/phr-frappe,chdecultot/frappe,pombredanne/frappe,almeidapaulopt/frappe,rkawale/Internalhr-frappe,indictranstech/fbd_frappe,gangadharkadam/v4_frappe,hatwar/buyback-frappe,yashodhank/frappe,gangadhar-kadam/helpdesk-frappe,MaxMorais/frappe,vqw/frappe,indictranstech/frappe-digitales,RicardoJohann/frappe,saurabh6790/pow-lib,pombredanne/frappe,saurabh6790/trufil_lib,ShashaQin/frappe,hernad/frappe,gangadhar-kadam/verve_test_frappe,pranalik/parjanalib,suyashphadtare/propshikhari-frappe,maxtorete/frappe,mbauskar/frappe,rohitwaghchaure/frappe-digitales,gangadhar-kadam/laganfrappe,paurosello/frappe,Tejal011089/medsyn2_lib,sbktechnology/sap_frappe,StrellaGroup/frappe,praba230890/frappe,indictranstech/frappe,saurabh6790/medlib,saurabh6790/med_test_lib,erpletzerp/letzerpcore,rohitwaghchaure/vestasi-frappe,mbauskar/helpdesk-frappe,mbauskar/helpdesk-frappe,ESS-LLP/frappe,rohitw1991/smarttailorfrappe,aboganas/frappe,chdecultot/frappe,saurabh6790/frappe,gangadhar-kadam/smrterpfrappe,cadencewatches/frappe,saurabh6790/tru_lib_back,saurabh6790/OFF-RISLIB,reachalpineswift/frappe-bench,gangadharkadam/saloon_frappe_install,gangadharkadam/v4_frappe,cadencewatches/frappe,gangadhar-kadam/nassimlib,bcornwellmott/frappe,gangadharkadam/johnfrappe,manassolanki/frappe,praba230890/frappe,indictranstech/tele-frappe,saurabh6790/frappe,indictranstech/frappe,vjFaLk/frappe,gangadharkadam/saloon_frappe_install,mhbu50/frappe,gangadhar-kadam/verve_test_frappe,PriyaShitole/MedViger-lib,indictranstech/phr-frappe,adityahase/frappe,saurabh6790/omn-lib,rohitwaghchaure/frappe-digitales,pombredanne/frappe,mbauskar/phr-frappe,nabinhait/frappe,gangadharkadam/v4_frappe,gangadhar-kadam/verve_test_frappe,Tejal011089/medsyn2_lib,mbauskar/omnitech-demo-frappe,rohitwaghchaure/frappe,sbkolate/sap_frappe_v6,drukhil/frappe,sbktechnology/sap_frappe,ShashaQin/frappe,suyashphadtare/propshikhari-frappe,saurabh6790/omnisys-lib,gangadharkadam/frappecontribution,mhbu50/frappe,gangadhar-kadam/lgnlvefrape,vjFaLk/frappe,indictranstech/omnitech-frappe,gangadharkadam/letzfrappe,pranalik/frappe-bb,suyashphadtare/sajil-final-frappe,suyashphadtare/sajil-final-frappe,saurabh6790/med_new_lib,drukhil/frappe,vjFaLk/frappe,Tejal011089/digitales_frapp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