fix(multi-tenancy): update lease Ns ID after restore

[NamanJain8]

• Fix bunch of tests.
• Update lease namespace ID after restore.

---

This change is 

[jarifibrahim]

Reviewable status: 0 of 10 files reviewed, 3 unresolved discussions (waiting on @manishrjain, @NamanJain8, and @vvbalaji-dgraph)

---

ee/backup/run.go, line 239 at r1 (raw file):

		if err := leaseID(result.MaxLeaseUid, pb.Num_UID); err != nil {
			return err

wrap the error please

---

ee/backup/run.go, line 242 at r1 (raw file):

		}
		if err := leaseID(result.MaxLeaseNsId, pb.Num_NS_ID); err != nil {
			return err

wrap the error please

---

worker/file_handler.go, line 204 at r1 (raw file):

				maxUid = groupMaxUid
			}
			if groupMaxNsId > maxNsId {

You can also use x.Max(...)

[NamanJain8]

Reviewable status: 0 of 10 files reviewed, 3 unresolved discussions (waiting on @jarifibrahim, @manishrjain, and @vvbalaji-dgraph)

---

ee/backup/run.go, line 239 at r1 (raw file):

Previously, jarifibrahim (Ibrahim Jarif) wrote…

wrap the error please

Done.

---

ee/backup/run.go, line 242 at r1 (raw file):

Previously, jarifibrahim (Ibrahim Jarif) wrote…

wrap the error please

Done.

---

worker/file_handler.go, line 204 at r1 (raw file):

Previously, jarifibrahim (Ibrahim Jarif) wrote…

You can also use x.Max(...)

Done.