sync: really test DeepCopyMap
sync: really test DeepCopyMap

since there current version suffers from a copy'n'paste error.

Change-Id: I1ef97a4413198dde10c5c926a2a9806724cd6d44
Reviewed-on: https://go-review.googlesource.com/42095
Reviewed-by: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
Run-TryBot: Brad Fitzpatrick <ae9783c0b0efc69cd85ab025ddd17aa44cdc4aa5@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

vsekhar/elastic-go,josharian/go,vsekhar/elastic-go,ImJasonH/go,christopher-henderson/Go,vsekhar/elastic-go,cloudflare/go,Cofyc/go,nawawi/go,polyverse-security/go,Cofyc/go,akutz/go,cloudflare/go,codestation/go,golang/go,CAFxX/go,derekmarcotte/go,CAFxX/go,cloudflare/go,josharian/go,derekmarcotte/go,derekmarcotte/go,polyverse-security/go,polyverse-security/go,polyverse-security/go,ImJasonH/go,derekmarcotte/go,golang/go,vsekhar/elastic-go,derekmarcotte/go,vsekhar/elastic-go,derekmarcotte/go,akutz/go,nawawi/go,akutz/go,CAFxX/go,ImJasonH/go,Cofyc/go,golang/go,derekmarcotte/go,cloudflare/go,polyverse-security/go,cloudflare/go,akutz/go,nawawi/go,Cofyc/go,golang/go,nawawi/go,CAFxX/go,ImJasonH/go,codestation/go,golang/go,akutz/go,ImJasonH/go,CAFxX/go,nawawi/go,codestation/go,ImJasonH/go,vsekhar/elastic-go,Cofyc/go,vsekhar/elastic-go,golang/go,polyverse-security/go,josharian/go,Cofyc/go,nawawi/go,vsekhar/elastic-go,Cofyc/go,Cofyc/go,nawawi/go,derekmarcotte/go,cloudflare/go,codestation/go,josharian/go,CAFxX/go,ImJasonH/go,polyverse-security/go,cloudflare/go,codestation/go,codestation/go,cloudflare/go,golang/go,CAFxX/go,akutz/go,CAFxX/go,akutz/go,codestation/go,codestation/go,josharian/go,josharian/go,polyverse-security/go,golang/go,josharian/go,josharian/go,nawawi/go,akutz/go,ImJasonH/go