Increase default memory size of vagrant vm to 4GB
Increase default memory size of vagrant vm to 4GB

Signed-off-by: Matthew McNew <be2bbfeb8f09c05321a39bd3422c5826e7dc06de@pivotal.io>

davidwadden/lattice-release,Klaudit/lattice,mikegehard/lattice,svrc-pivotal/lattice,datachand/lattice,davidwadden/lattice,cloudfoundry-incubator/ltc,datachand/lattice,Klaudit/lattice,davidwadden/lattice-release,svrc-pivotal/lattice,svrc-pivotal/lattice,svrc-pivotal/lattice,mikegehard/lattice,SrinivasChilveri/lattice,datachand/lattice,felipeg48/lattice,SrinivasChilveri/lattice,Klaudit/lattice,SrinivasChilveri/lattice,davidwadden/lattice,datachand/lattice,felipeg48/lattice,cloudfoundry-incubator/ltc,SrinivasChilveri/lattice,Klaudit/lattice