listner changes for grpc

GRPC changes coresls with latest updates 

Fix: Response for mql/state was invalid json.

See merge request !92

1. Fix: Response for mql/state was invalid json.

Dpk cache method add

See merge request !91

Changes related to GetItemsCount Method added in cachemdl

database server port feature added

See merge request !90

1. Fix: Server connecting to 0 port if not provided

Fix: 412 jwt precondition failed for fasthttp

See merge request !89

1. Fix: 412 jwt precondition failed. The open request was setting empty token in response causing 412 for further restricted requests.

Fix: Panic for single object is not included in final result and bulk queries

See merge request !88

1. Fix: Panic if data to bulk functions is empty array.

1. Add: Process post hook for nil data

1. Fix: Panic if selected single object is not included in final result. The post hook was dereferrencing nill data resulting in panic.

Fix: Role based access by checking group

See merge request !87

Dynamic  form evaluation

See merge request !86

Fix: Revert coremongo panic fix.

See merge request !85

1. Fix: Revert coremongo panic fix as its breaking existing sls functionality. Need to check for empty arrays instead of empty string in existing code.

Dpk random int generation fix

See merge request !83

Fix: Coremongo for nil rs and statemdl

See merge request !84

1. Fix: Statemdl need to be initialised for DAL, resulting in panic if not initialised.

1. Fix: Nil pointer dereference error for Result.

To verify new changes working as expected.

Provided seed based on time, to generate unpredicted  random key generation.

1. Fix: GC cache tests

FIx: Remove GC Cache dependency from cachemdl

See merge request !82

1. FIx: Remove GC Cache dependency from cachemdl

1. Fix: Rolebased services can be accessed by restricted user

Add: prefer connection to primary

See merge request !81

1. Fix: failed to connect to primary 

1. Add: prefer connection to primary

Added grid fs support

See merge request !78