travis: do not install lvm2
travis: do not install lvm2

We don't depend on livdevmapper anymore! \o/

Related to #666 and #684.

Endika/tsuru,jblancett/tsuru,ggarnier/tsuru,ArxdSilva/tsuru,RichardKnop/tsuru,tsuru/tsuru,ArxdSilva/tsuru,ArxdSilva/tsuru,tsuru/tsuru,ArxdSilva/tsuru,mderaldo/tsuru,kgrvamsi/tsuru,guilhermebr/tsuru,hugoantunes/tsuru,gciotta/tsuru,RichardKnop/tsuru,guilhermebr/tsuru,cezarsa/tsuru,4eek/tsuru,gwmoura/tsuru,cgvarela/tsuru,jblancett/tsuru,4eek/tsuru,guilhermebr/tsuru,jblancett/tsuru,firebitsbr/tsuru,4eek/tsuru,guilhermebr/tsuru,tuxmonteiro/tsuru,mderaldo/tsuru,Endika/tsuru,kgrvamsi/tsuru,cezarsa/tsuru,mderaldo/tsuru,RichardKnop/tsuru,gciotta/tsuru,hcxiong/tsuru,tuxmonteiro/tsuru,tsuru/tsuru,tuxmonteiro/tsuru,kgrvamsi/tsuru,ggarnier/tsuru,hcxiong/tsuru,cezarsa/tsuru,gciotta/tsuru,firebitsbr/tsuru,cgvarela/tsuru,firebitsbr/tsuru,tsuru/tsuru,hugoantunes/tsuru,gwmoura/tsuru,ggarnier/tsuru,hcxiong/tsuru,cezarsa/tsuru,ggarnier/tsuru,cgvarela/tsuru,gwmoura/tsuru,Endika/tsuru