helper/schema: Add schemaMap.DeepCopy
helper/schema: Add schemaMap.DeepCopy

This provides a deep copy of a schemaMap, which will be needed for the
diff customization process as ResourceDiff will be able to flag fields
as ForceNew - we don't want to affect the source schema.

grasshoppergroup/terraform,tpounds/terraform,lusis/terraform,hartzell/terraform,chrisjharding/terraform,brandontosch/terraform,svanharmelen/terraform,ddegoede/terraform,fatmcgav/terraform,pryorda/terraform,vancluever/terraform,rnaveiras/terraform,apparentlymart/terraform,drebes/terraform,asedge/terraform,chrisjharding/terraform,huydinhle/terraform,HotelsDotCom/terraform,kl4w/terraform,vancluever/terraform,tpounds/terraform,grasshoppergroup/terraform,pdecat/terraform,apparentlymart/terraform,ColinHebert/terraform,asedge/terraform,ewbankkit/terraform,hooklift/terraform,ewbankkit/terraform,luis-silva/terraform,HotelsDotCom/terraform,nlamirault/terraform,rnaveiras/terraform,lusis/terraform,kjmkznr/terraform,ColinHebert/terraform,VladRassokhin/terraform,HotelsDotCom/terraform,ColinHebert/terraform,antonbabenko/terraform,tommynsong/terraform,donaldguy/terraform,iansheridan/terraform,antonbabenko/terraform,hooklift/terraform,ColinHebert/terraform,ddegoede/terraform,ddegoede/terraform,vancluever/terraform,yanndegat/terraform,chrisjharding/terraform,paultyng/terraform,asedge/terraform,apparentlymart/terraform,iansheridan/terraform,lusis/terraform,fatmcgav/terraform,pryorda/terraform,brandontosch/terraform,pdecat/terraform,justnom/terraform,brandontosch/terraform,hashicorp/terraform,tpounds/terraform,ddegoede/terraform,gechr/terraform,mattray/terraform,tommynsong/terraform,iljaskevic/terraform,yanndegat/terraform,yanndegat/terraform,hartzell/terraform,grasshoppergroup/terraform,paultyng/terraform,heimweh/terraform,nlamirault/terraform,youhong316/terraform,chrisjharding/terraform,justnom/terraform,heimweh/terraform,svanharmelen/terraform,huydinhle/terraform,gechr/terraform,tpounds/terraform,youhong316/terraform,ewbankkit/terraform,paultyng/terraform,gechr/terraform,pradeepbhadani/terraform,ewbankkit/terraform,pradeepbhadani/terraform,donaldguy/terraform,tommynsong/terraform,iljaskevic/terraform,mattray/terraform,fatmcgav/terraform,kl4w/terraform,hooklift/terraform,apparentlymart/terraform,pdecat/terraform,heimweh/terraform,hartzell/terraform,antonbabenko/terraform,HotelsDotCom/terraform,drebes/terraform,brandontosch/terraform,donaldguy/terraform,antonbabenko/terraform,iljaskevic/terraform,youhong316/terraform,luis-silva/terraform,luis-silva/terraform,drebes/terraform,hartzell/terraform,kl4w/terraform,iljaskevic/terraform,kl4w/terraform,paultyng/terraform,asedge/terraform,VladRassokhin/terraform,pdecat/terraform,kjmkznr/terraform,hashicorp/terraform,huydinhle/terraform,grasshoppergroup/terraform,ddegoede/terraform,youhong316/terraform,pryorda/terraform,kjmkznr/terraform,svanharmelen/terraform,luis-silva/terraform,apparentlymart/terraform,VladRassokhin/terraform,nlamirault/terraform,brandontosch/terraform,justnom/terraform,huydinhle/terraform,justnom/terraform,iansheridan/terraform,rnaveiras/terraform,drebes/terraform,mattray/terraform,donaldguy/terraform,heimweh/terraform,svanharmelen/terraform,lusis/terraform,mattray/terraform,antonbabenko/terraform,kjmkznr/terraform,hashicorp/terraform,chrisjharding/terraform,heimweh/terraform,vancluever/terraform,yanndegat/terraform,iansheridan/terraform,hooklift/terraform,fatmcgav/terraform,pradeepbhadani/terraform,VladRassokhin/terraform,HotelsDotCom/terraform